International economics

Growth, comparative advantage and the first wave

Growth has several mechanisms. Reallocating workers and capital to more productive uses raises output even without more inputs. Capital accumulation raises output but faces diminishing returns. Innovation raises productivity. The lecture adds a demand-side constraint: firms need a market large enough to absorb their production.

Comparative advantage depends on opportunity cost. Opportunity cost is what must be given up to produce something. Even a country that is less productive in every activity can gain from specializing where its relative disadvantage is smallest. Aggregate gains do not imply that every worker gains.

The first wave separated production from consumption. Better transport and communication expanded markets. Specialization raised productivity; the gains were distributed unevenly across countries and social groups.

Separating production from consumption creates business opportunities. After the break, the lecturer applies the first wave’s logic to e-commerce, food delivery and filmed concerts: intermediaries can connect producers to customers beyond the original place of production.

Middle-class demand, scale and variety

Market size depends on the customers you serve. A shift in the income distribution can expand the group above a purchasing threshold much faster than average income grows. The lecture contrasts premium services and branded retail with price-sensitive platforms.

Trade among similar countries has its own logic. Economies of scale mean that average cost falls as production expands. Germany and France can exchange different car brands even with similar skills and incomes. Product differentiation and production scale explain this better than a simple rich-country/poor-country division of labour.

China’s demand and supply can move in different directions. The lecturer argues that rising middle-class demand for services can coexist with policy-supported manufacturing expansion. The United States and other advanced economies appear in the lecture as more service-intensive comparators; the issue is the composition of demand, not only its total size.

Countries outside these markets may struggle to industrialize. The core–periphery argument describes advanced industrial economies at the centre and developing economies dependent on primary commodities. This is a framework discussed in class, not a claim that every developing country follows one path.

Hyper-globalization and production in tasks

Global value chains divide a product into tasks across borders. A global value chain (GVC) links design, components, assembly, distribution and services. A capital-intensive final product can contain labour-intensive tasks performed in a labour-abundant economy.

Multinational enterprises coordinate these chains. A multinational enterprise (MNE) operates across countries. Internal coordination can reduce the costs of contracting with many separate suppliers. Mobile capital also gives firms bargaining power over host governments.

Technology and institutions work together. Lower transport and communication costs make fragmentation feasible. Trade and investment liberalization, and the end of the Cold War, reduce barriers to organizing production across borders.

The state economy can complement global firms. In the lecturer’s account, competition among Chinese local governments for investment, employment and output encourages infrastructure and support for incoming firms. The United States supplies examples of finance and ideas, while China supplies examples of manufacturing and assembly.

Who gains, who loses, and why politics changes

The smile curve separates stages of value creation. Design, research, branding and after-sales services can capture more value than assembly. Automation can change these shares; the class explicitly questioned whether the pattern remains the same over time.

Mobility changes bargaining power. Owners of capital, knowledge and scarce skills can benefit from global markets. Lower-income-country workers may gain employment, while some workers in richer economies face import competition, offshoring and weaker bargaining power.

Aggregate gains require a distribution mechanism. Compensation, retraining and public services do not follow automatically from a larger economic pie. The lecturer connects inadequate adjustment support and declining social mobility to political polarization.

Compare countries and groups carefully. The lecture discusses rising wealth concentration in both China and the United States, alongside evidence from Europe and other economies. Some figures are uncertain even in the lecturer’s account; they should not be treated as verified current statistics.

Tariffs: objectives, incidence and limits

Separate tariff objectives before judging results. The lecture lists trade-deficit reduction, revenue, manufacturing revival, reduced dependence on China, electoral support, bargaining power and national security. Success on one objective does not establish success on the others.

Tariffs redistribute income and can destroy gains from trade. In the standard small-country diagram, consumers lose from a higher domestic price; protected producers and the government gain. Distorted production and reduced consumption create deadweight losses. Who ultimately bears the tariff depends on price adjustment, not simply who pays customs.

Manufacturing employment has several drivers. Automation, structural change and workers’ preferences matter alongside trade. Returning a factory does not necessarily return its former number of jobs. Policy uncertainty can delay investment even when protection is intended to encourage it.

A bilateral deficit differs from the total external balance. Replacing imports from China with imports from other countries can change the bilateral figures without resolving the United States’ aggregate imbalance. The lecture compares China with Mexico, Vietnam and other alternative suppliers.

Rerouted trade and China’s place in the value chain

Direct trade can fall while indirect dependence persists. A third country may export more final goods to the United States while importing more Chinese components. Gross bilateral trade alone cannot establish whether supply chains have decoupled.

Distinguish three production strategies. “In China for the world” uses China as an assembly and export centre. “In China for China” serves its domestic market. “China plus one” adds another production location; the later “China plus N” description treats China as an upstream supplier to multiple locations, where N means multiple partner economies.

Do not confuse transshipment with production relocation. A new shipping route, new assembly work and deeper local value creation are different changes. The lecturer presents customs discrepancies as clues, while acknowledging that they alone do not prove evasion.

Compare upstream and downstream roles. The United States remains a destination market in the examples; China supplies intermediate inputs; Vietnam, Mexico and other economies can gain assembly or export shares. A lower direct import share need not mean less Chinese value embedded in final goods.

Power competition, security and the closing discussion

Economic dependence has a security dimension. A low-cost supplier can also become a source of geopolitical vulnerability. Firms and governments may pay more for resilience or diversification, trading some efficiency for perceived security.

The lecturer contrasts several explanations of international order. Francis Fukuyama represents convergence toward liberal institutions; Samuel Huntington emphasizes civilizational divisions; John Mearsheimer’s offensive realism emphasizes survival and power when no higher global authority guarantees security.

The Thucydides Trap is discussed as a risk, not an inevitability. The closing point is that strategic misjudgments can create conflict. The historical analogy should not substitute for examining the incentives and choices of the countries involved.

Energy and automation were raised in the final discussion. A student asked whether energy could replace labour as the key production factor. The lecturer emphasized a combination of ideas, energy and resources, and artificial-intelligence-assisted robotics, rather than a single replacement factor.

Globalization, digital trade and domestic rules

Globalization changes what crosses borders. Goods, services, capital, people and data move through different channels. A tariff on goods does not capture all forms of integration. The lecture contrasts US and Chinese approaches to digital activity; neither can be understood from merchandise trade alone.

Domestic rules matter for cross-border business. Product standards, data rules, tax systems and labour institutions shape access to markets. Deeper integration can constrain the policies governments use to maintain domestic legitimacy.

The globalization paradox is about compatibility. Gains from integration rely on functioning domestic institutions, yet integration can weaken those institutions’ ability to regulate and redistribute. More integration is not automatically better under every institutional arrangement.

The political trilemma and distributional conflict

Define the three objectives. National sovereignty means retaining national policy authority; democratic politics means responding to domestic political choices; hyper-globalization means very deep economic integration. The political trilemma describes tensions in pursuing all three fully at once.

The alternatives allocate authority differently. The golden straitjacket retains national states while narrowing domestic policy choice. The Bretton Woods compromise leaves more room for national policy by limiting integration. Global federalism moves political authority above individual states.

The euro area illustrates incomplete integration. A shared currency and integrated markets interact with largely national fiscal and political responsibilities. More political integration and less economic integration are different responses to that tension.

Distribution links economics to legitimacy. Trade and technological change can benefit some workers, owners and countries more than others. A global income-distribution chart does not, by itself, identify which mechanism caused each gain or loss. Aggregate gains do not settle the compensation question.

Power, interests and legitimacy in global governance

Governance can exist without a world government. Rules, procedures and norms coordinate collective action even where no single authority can command every participant.

Global is broader than interstate. States remain central, but international organizations, multinational corporations, nongovernmental organizations and individuals also shape rules and standards. Multinational corporations are firms with operations in multiple countries.

Three dimensions must be considered together. Power affects who can enforce a rule; interests affect who supports it; legitimacy affects whether participants accept the rule as appropriate. A system can be effective in one dimension and weak in another.

Domestic adjustment affects international cooperation. If governments cannot sustain support among groups bearing globalization’s costs, support for international institutions weakens. Governance therefore involves the distribution of gains within countries as well as between them.

Multinational firms: trade, value added and factor income

Gross exports are not domestic income. A finished product shipped from an assembly location includes imported components and services. Gross trade attributes the shipment to that location; value-added trade traces where production income was created.

Ownership answers a further question. Trade in factor income (TiFI) attributes income accruing to a country’s owned factors to the foreign final demand that generated it. The place of production and the owner receiving profits need not be the same country.

The Apple example separates production from ownership. Assembly in China, upstream inputs from several economies and US-owned design or intellectual property belong to different parts of the account. The lecturer contrasts factory-based and factoryless production to explain why a bilateral goods deficit is an incomplete measure of benefit.

Compare like with like. Company revenue is gross sales, whereas gross domestic product (GDP) measures value added. A ranking mixing corporate sales and country GDP exaggerates comparability; gross margin is a closer comparison discussed in class, but is still not identical to economy-wide value added.

Taxing activity across borders

Transfer pricing is pricing within a corporate group. It can shift where accounting profit appears without an equivalent relocation of real production. Not every intragroup transaction implies wrongdoing; the lecture’s concern is the mismatch between activity, booked income and tax rights.

Base erosion and profit shifting (BEPS) names that policy problem. Tax-base erosion means reducing the income exposed to taxation in a jurisdiction. Profit shifting relocates reported income across jurisdictions.

The two pillars address different questions. In the lecture’s framework, Pillar One concerns allocation of taxing rights, including market locations; Pillar Two concerns a minimum-tax framework intended to reduce incentives for low-tax profit shifting. These are summaries of the taught proposals, not a statement of present implementation in any jurisdiction.

Digital business complicates physical-presence rules. A firm can earn revenue from customers in a market without operating a conventional local establishment. Measuring the location and value of digital activity therefore becomes part of the governance problem.

Artificial intelligence as a governance case

Artificial intelligence (AI) involves both development and regulation. The lecture contrasts US and Chinese approaches through research, firms, deployment and state coordination. More policy interventions do not necessarily mean more subsidies, better innovation or stricter regulation in every domain.

Different measures answer different questions. Papers, patents, company counts and deployment targets measure different parts of an innovation system. Compare China and the United States on the same measure and period; do not convert a single chart into an overall ranking.

Industry-specific AI raises coordination issues. Data, models, industrial users and technical standards must work together. The lecturer treats embodied intelligence and manufacturing applications as examples of technology changing the tasks of government.

Targets are not outcomes. Dated policy aspirations on the slides are examples of the lecturer’s argument. They should not be presented as accomplished results or as a guarantee of future deployment.

China’s outward expansion and the distribution of risk

Going abroad expands exposure as well as markets. Overseas sales and investment bring host-country law, security concerns, local communities and political disruption into corporate strategy. Compare a Chinese firm’s exposure with the constraints faced by US, European or Japanese firms in the same host market.

Trade tools have competing objectives. Export incentives, rebates and controls can affect competitiveness, fiscal costs and strategic dependence differently. The lecture discusses these mechanisms through China’s changing export mix and industrial position.

Production abroad and income from abroad differ. A country’s firms can receive income from foreign operations even when output is produced elsewhere. Japan and Germany appear as comparators for China’s transition toward a larger overseas asset and income position.

Institutions affect investment risk. Market opportunities in the Global South may coexist with less predictable legal enforcement or greater security exposure. A firm’s location decision must assess both commercial return and the institutions supporting that return.

Standards, public goods and a changing economic order

Value chains extend beyond assembly. Research, standards, brands, finance and institutions shape the income a firm can retain. Global value chains (GVCs) are the linked production stages located across countries.

Economic scale can increase rule-making influence. Large markets, technical capabilities and outward investment can increase bargaining power. They also create demands to contribute to public goods and accept responsibilities beyond immediate commercial gain.

Currency performs several international roles. Trade settlement, investment, credit and reserves are distinct uses. Industrial scale alone does not establish dominance in all of them; the slide introduces issues developed in the next day’s monetary-system lecture.

The closing message is a changing balance. Sovereignty, business and governance must be reconsidered as firms become more international and regulation reaches further into business activity. The lecturer emphasizes that interdependence persists even while geopolitical competition changes its terms.

Financial sanctions, messaging and settlement

Financial sanctions can disrupt an industrial firm even without a direct ban on its products. Loss of payment access or dollar liquidity can prevent an exporter from collecting revenue, financing trade or paying suppliers.

The Society for Worldwide Interbank Financial Telecommunication (SWIFT) supplies standardized financial messages. The Clearing House Interbank Payments System (CHIPS) supports dollar clearing and settlement. A message instructing a payment and the transfer of funds are different functions.

Correspondent banks connect institutions that do not share direct access to a payment system. Netting reduces the funding needed for offsetting payments; it does not eliminate the need for liquidity or trusted counterparties.

The Russian examples link the financial and real sides of business. The lecture separates trade restrictions, reserve freezes and payment-network restrictions rather than treating every sanction as the same intervention.

Sanctions, currency substitution and business exposure

A reserve freeze can reduce a central bank’s ability to supply foreign-currency liquidity. Firms and banks then face constraints beyond their own balance sheets.

Alternative currencies or intermediaries can preserve some transactions but introduce conversion, liquidity and compliance costs. A change in Russian invoicing does not by itself establish a worldwide change in the dominant currency.

Class discussion connects sanctions to ownership checks, supply chains, advance-payment requirements and future servicing income. A profitable sale can become less attractive if later service or spare-parts revenue is at risk.

The lecturer presents a trade-off: sanctions exploit the advantages of the existing dollar network but may encourage efforts to build alternatives. The size and durability of those alternatives require separate evidence.

The functions of an international currency

Invoicing is choosing the currency in which a price is quoted. Payment is transferring funds. Settlement completes the financial obligation. The currency used for one function need not mechanically determine every other function.

Foreign exchange (FX) is the market for converting currencies. If a quote gives Chinese yuan per US dollar, a higher number means that more yuan are needed to buy a dollar: the yuan has depreciated against the dollar.

Firms can invoice exports in dollars while paying domestic wages in renminbi. That creates a currency mismatch and demand for conversion or hedging.

Compare currency shares using the same denominator. Trade invoicing, foreign-exchange turnover, international bonds and official reserves measure different activities. A lower share in one does not imply the currency has ceased to matter in another.

Reserves, exchange-rate defence and international liquidity

Official foreign-exchange reserves are foreign assets held by monetary authorities. A central bank defending its currency can sell foreign reserves and buy domestic currency, changing market supply and demand.

A fixed or managed exchange rate still operates through a market. Policy credibility, reserves, interest rates and restrictions influence whether the chosen rate can be sustained.

A central bank swap line provides access to another currency through an agreement between monetary authorities. It is distinct from a firm’s currency hedge and from lending by the International Monetary Fund (IMF).

The IMF and reserve-currency central banks differ in mandate, resources and access conditions. The lecture compares their capacity to provide liquidity; the spoken balance-sheet figures are dated examples, not current resource estimates.

How the dollar rose relative to sterling

Economic size alone did not instantly replace sterling with the dollar. The lecture connects US trade and output with the development of finance, central-bank support and markets for dollar-denominated instruments.

Trade finance links the currency used in commercial transactions to the currency in which banks lend and investors hold assets. Dollar acceptance markets helped create this infrastructure.

The wars and changing international balance sheets altered the positions of Britain and the United States. Compare economic capacity, market depth and institutional support rather than relying on a single date or national-output ranking.

The historical case illustrates path dependence: a currency’s present position reflects accumulated infrastructure and past coordination as well as current economic fundamentals.

Bretton Woods and the Triffin dilemma

The Bretton Woods arrangement linked the dollar to gold and other currencies to the dollar. The lecture contrasts the US proposal with John Maynard Keynes’s proposal for an international clearing arrangement and the bancor.

The Triffin dilemma concerns the tension between supplying international liquidity through national liabilities and maintaining confidence in the anchor supporting those liabilities.

If holders doubt the promised conversion, attempts to redeem early can intensify pressure on limited gold reserves. The lecturer uses a run-like mechanism to explain why a peg can fail even when participants previously accepted it.

The end of dollar–gold convertibility did not automatically end dollar use. The networks, contracts and financial markets built around the dollar remained economically relevant.

Why dollar dominance persists

Currency choices complement one another. A firm may match the currency of its revenues, inputs and borrowing to limit exchange-rate risk; a bank similarly considers the currencies of assets and liabilities.

A firm choosing alone may gain little from switching away from the currency used by its trading partners and lenders. Coordinated switching is harder than simply announcing an alternative.

Deep markets, liquidity and broad use reinforce one another. These mechanisms help explain persistence without assuming that the dominant issuer is permanently immune to policy errors.

The lecturer separates economic benefits such as financing advantages from geopolitical influence. The desirability of dominance depends on whose benefits and costs are being assessed.

Debt, stablecoins and alternative systems

Changes in US fiscal prospects and perceptions of asset safety can affect demand for dollar liabilities. The lecture discusses this as a potential source of tension, not proof that a transition is imminent.

A stablecoin aims to maintain value relative to an anchor. A dollar-linked stablecoin can extend dollar use through a new technology rather than replace the dollar as the unit of account.

Alternative payment infrastructure and an alternative dominant currency are separate propositions. Technology can reduce transaction frictions while leaving the underlying currency choice unchanged.

Assess a proposed challenger through liquidity, credibility, market access and coordination. Avoid treating either historical persistence or technological novelty as a guarantee of the future.

Renminbi internationalization and the monetary trilemma

Renminbi internationalization means wider use of China’s currency across borders. Its use in trade, financial assets and reserves can develop at different speeds.

The monetary trilemma concerns the tension among a fixed exchange rate, free capital movement and independent monetary policy. This differs from Day 1’s political trilemma of sovereignty, democracy and hyper-globalization.

Capital controls can preserve policy space but also restrict foreign access and the ability to move funds freely. China’s choices must be evaluated against those objectives, not only against the goal of increasing currency usage.

Compare China’s managed exchange-rate setting with the US dollar’s market and policy setting. Neither the scale of Chinese trade nor a stated internationalization objective removes the underlying institutional trade-offs.

Trade settlement, CIPS and the closing assessment

Opening access to renminbi assets and making renminbi trade settlement easier are related but distinct policy paths. Offshore liquidity and access for counterparties matter alongside domestic policy.

The Cross-border Interbank Payment System (CIPS) supports renminbi payments. Its coverage and transaction volumes should be compared with other systems on compatible definitions and dates.

The lecture’s conclusion holds two ideas together: no dominant arrangement is necessarily permanent, yet replacing an established currency network takes time. Growth in an alternative from a small base need not make it a near-term replacement.

Connect all three sessions: production networks shape trade; governance shapes the rules firms face; the monetary system shapes how firms invoice, fund and settle those transactions.

Technology globalization: adoption, culture and responsibility

Professor Lu Yao’s keynote treats cultural distance as a barrier to technology adoption. Successful internationalization requires understanding local users and institutions as well as exporting a technically capable product.

Trust is built through solving real problems, building local capabilities and creating value. This connects the panel to the lectures on global governance: market access depends on legitimacy and acceptance, not only cost or technical performance.

Automotive competition and the limits of inherited advantage

Dr. Hans Georg Engel draws on his engineering and management experience at Mercedes-Benz to compare competition in China with established Western automotive practices. Treat the examples as a practitioner’s account of particular firms and periods, rather than a universal ranking.

Competition can come from digital and internet firms, not only traditional carmakers. Faster product cycles and changing customer expectations alter the value of legacy engineering processes, brand reputation and distribution systems.

Price reductions, feature competition and online reputation interact. The Li Auto MEGA example illustrates how communication and cultural associations can affect a product’s commercial reception; technical capability alone does not secure demand.

Local engineering, customer preferences and industry transition

Localization extends into research and development (R&D), product design and testing. Rear-seat space, comfort and even perceptions of interior smell illustrate why a product successful in one market may require substantive changes in another.

Compare the capabilities of a multinational’s headquarters with those of its local teams. A local engineering centre creates value when it can influence decisions rather than merely implement a centrally fixed design.

The automotive presentation covers development-cycle comparisons, environmental ambitions and an intelligent-vehicle roadmap. These are dated presentation claims and targets; they should not be represented as verified current outcomes.

Building trust and creating local value

Siddharth Chatterjee presents international engagement through development, public policy and practical cooperation. The stated emphasis is on building trust and creating local value rather than assuming that economic scale automatically produces acceptance.

Political commitment, effective public policies and partnerships are discussed as enabling conditions for development. The speaker’s country examples and causal interpretations remain attributed perspectives.

People-to-people contact, education and dialogue can complement commercial relationships. This connects firm strategy with the lecture’s broader view of governance involving actors beyond national governments.

Roundtable: localization, investment and geopolitical uncertainty

Steven Mei moderates the discussion with Hans Georg Engel, Siddharth Chatterjee and Sherry Hu. The recurring question is how Chinese technology firms can expand internationally while adapting to different political, commercial and social environments.

Local capabilities matter alongside market entry. The discussion connects R&D, supply-chain depth, partnerships and cross-border investment with firms’ ability to deliver value in a host economy.

Trust must be demonstrated through conduct and sustained relationships. A firm’s technical offer, ownership structure and country of origin can be interpreted differently across markets; an effective strategy addresses those concerns rather than dismissing them.

Organizational learning and the electric-vehicle transition

International collaboration can fail when participating firms cannot reconcile identity, incentives and decision-making. The automotive examples connect the promise of combining strengths with the difficulty of integrating organizations.

The discussion of electric vehicles distinguishes product capability from adoption conditions. Charging convenience, infrastructure, customer preferences and the role of transitional technologies influence the pace of change.

Business conclusions should be conditional: compare markets and user needs before assuming that one technology mix or one firm’s historical advantage will prevail everywhere.

AI, local context and the closing discussion

The final questions connect AI capabilities, access to computing resources and international business development. Technical capacity is one part of a wider setting that includes institutions, skills and commercial relationships.

Understanding local history, people and context is presented as a practical requirement for international leadership. This reinforces the module’s progression from economic incentives to governance, finance and implementation.

The closing message returns to Chinese technology globalization through trust and value creation.