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This case demonstrates the growing importance of water policy and water scarcity on key business decisions. It uses the merger of two drip irrigation companies to show how the business models of multinationals were shifting to accommodate current and expected water crises in many parts of the world. In 2012, Jain Irrigation Systems, a multinational founded in India, became sole owner of the Israel-based NaanDan Joint Venture, a privately held, well-respected irrigation technology firm. The creation of NaanDanJain evidenced the increasingly visible role of India as a global player whose multinationals acquired high-tech companies from more advanced economies. But more important for this case, when considering demographic and economic variables for each country, the merger illustrated the challenges of providing irrigation to small farmers. This case situates the formation/establishment of NaanDanJain within the divergent water policies and water practices of both Israel and India.

This note is used in the Darden course elective, "The Economics of Water." In many cities, water, sewage, and electricity utilities are city-owned, not-for-profit institutions. Indeed, a 2011 survey of 330 major cities worldwide published by Global Water Intelligence reveals that almost 85% of the water services of the cities surveyed are publicly managed; public-private partnerships account for 5%, and about 10% are privately run. As this note argues, there is a reason for this institutional setup.

Water is a renewable natural resource. Driven by solar energy and gravity, the global water cycle indefinitely circulates water through the atmosphere, over continents, and across oceans. On a more local level, however, water sometimes has more of a nonrenewable character because it can be depleted, at least to some degree. Withdrawing too much water from an aquifer that has only limited recharge, for example, diminishes stored water. This note discusses groundwater withdrawal, how it is optimally done, and how it depends on the particular institutional setting.

This note is assigned in Darden's course elective, "Global Economics of Water." There is more than enough fresh water to satisfy the world's needs. The primary concern, however, is the geographical mismatch between water needs and the availability of water to communities who need it. Hence, a major challenge for the 21st century is to better manage this mismatch. In this note, we focus on one particular factor-climate change-and how it may contribute to future stress on water resources. We lay out the basics of climate change and the hydrological cycle, and we point to some of the intricate ways in which both phenomena are connected. This note does not contain blanket policy recommendations as to how to fight global warming beyond the general statement that the rational response to the risk and uncertainty of higher global temperatures and their associated environmental changes is to take actions that ensure against potentially adverse effects.

The case is about a city's water security and draws on the intense debate about the construction of a reservoir in a college town in Virginia in the wake of a record drought. The case highlights the role of public utilities in water provision, illustrates the different positions of various stakeholders, and raises the question of what the appropriate price for water is. It provides stylized facts of water use across sectors and rests on a basic analysis of present and future water demand as well as on an assessment of future water supply. This case is used in Darden's elective, "The Global Economics of Water." It would also work well in courses dealing with the environmental impacts of urban planning."

This case is used in Darden's first-year course "Global Economies and Markets" and taught at the University of Virginia's School of Architecture, though it is also appropriate for courses in environmental sustainability. A technical note titled "Water Markets from an Economic Point of View" (UV6903) was developed to accompany this case or other cases addressing the topic of global water supply. In 2010, Australian funds were looking for foreign investors in the country's water market. Funds advertised water as "blue gold." Australian Causeway Asset Management, for example, expected high future returns because of the "chronic supply/demand imbalance for Australian water, which will result in higher water prices. Owning Australian Water Entitlements provides investors with direct exposure to water prices." There was quite a story to be told about water on this continent of notably variable weather, especially since the "Big Dry," also known as the Millennium Drought. More than anything, the drought had supported water markets as a central tool in Australian water management. As the drought receded, the floods of 2009, 2010, and 2011 took its place, so water prices were low and potentially attractive for buyers abroad.

Recent droughts and the increase in food prices they trigger underscore that freshwater scarcity is bound to be a major challenge of the 21st century. Increased water demand due to population growth and rising living standards (with changing diets and lifestyles) strains available water resources. In spite of reports about an imminent water crisis, the world is not running out of water. Water is a renewable global resource of which there is more than enough. The major concern is that water is very unevenly distributed across and within countries. Water scarcity is thus primarily a local phenomenon, and fears mount that climate change might worsen an already bad situation in water-scarce areas.

In this note, we look at what happens when there are only few producers. For simplicity, we start with a market with only one supplier, a monopolist. We analyze the price the monopolist charges and the amount of output he or she produces, how those decisions affect overall welfare, and in what circumstances government intervention can increase overall welfare.

It is an understatement to say that environmental challenges are attracting attention. Sustainability tops the list of challenges for the 21st century. There is no consensus about how to address these challenges in a politically feasible way. This note offers a conceptual framework that firms and consumers can use to start thinking about the economic challenges ahead and how economic policies are likely to affect the environment within which they operate.

Newspaper headlines and editorials revealed the intense attention the euro zone had received in the last few months. The current crisis occurred shortly after Greece announced that its 2009 budget deficit was 13% of GDP-twice as high as previously predicted. For some, this was the beginning of the end for the euro zone. Could it lead to the demise of the euro altogether? Others insisted that expelling Greece might be necessary. In tune with headlines at the time, the exchange markets did not display much confidence in the euro. By summer 2010, the euro had lost at least 10% of its value against the dollar since the beginning of 2010. Financial markets were nervous. What should EU leaders do help stave off a major crisis?

A hedge-fund strategist had two decisions to make. First, what was the path of core euro zone long-term interest rates likely to be over the next year? Was the dramatic decline in German long rates over the past two years an aberration that would soon be reversed, or was it part of the "new normal" that would persist for some time? Second, how would periphery long rates evolve relative to core rates? That is-the spread between long rates in the likes of Greece, Spain, and Ireland and those in Germany-how would they evolve over the next year? Was the dramatic divergence in euro zone long rates likely to persist, or would the coming year see a reconvergence? He knew many factors influenced long-term interest rates; he would have to use his entire toolkit to address this issue. The evidence was in no way clear-cut. Some factors pointed toward lower German rates, some toward higher, some toward a widening of euro zone spreads (even a dissolution of the euro zone as we know it?), and some toward reconvergence. To form an opinion on the likely paths of euro zone long rates, he would have to sort through mounds of information.

This case describes and analyzes the negotiations surrounding the U.S.-Thailand free trade agreement (FTA) that never materialized. The case offers an excellent opportunity to discuss the complexities of trade negotiations, the welfare analyses of FTAs (with trade diversion and creation), and the growth of FTAs and customs unions (CUs) as opposed to multilateral trade liberalizations.

This technical note lays out the welfare analysis of free trade areas and customs unions with trade creation and trade diversion. It also discusses some of their advantages and disadvantages.

Multinationals are active in different countries. This note explores why this is the case and how multinationals can be competitive in these foreign environments. At the same time, the note discusses recent trends in foreign direct investment (FDI).

The diamond industry has been subject to significant change. There is increased competition from low-wage countries such as India and China, the concern about blood diamonds, and policy issues affecting the viability of trading diamonds. In this case, we study how Antwerp's dominant position in the diamond trade is being challenged and eroded. The case offers a good opportunity to introduce and discuss comparative advantage and relate it to Heckscher-Ohlin type of trade.

The case documents the growth strategy that the IMF wanted to orchestrate after the first oil crisis and as the world economy did not return to the growth rates of the 1960s. The case illustrates the pinnacle of Keynesian thinking that prevailed at the time: a view of the international economy as an almost hydraulic system that could be manipulated by government policies at will to reach desirable aggregate targets. The failure of the strategy, among other things, emphasizes the importance of inflationary expectations. The case is also a nice opportunity to discuss the Phillips curve as well as the current global imbalances and what can be done about them.

This case will lead students to a discussion of the causes and effects of hyperinflation. The link with fiscal deficits is explored, and so is the link with societal changes. The particular focus is on the hyperinflation in Zimbabwe under President Robert Mugabe whose government implemented a controversial land redistribution program. The case can be taught with a class experiment-see teaching note UV2706.

This case features a prominent antidumping case in the United States against six of its major foreign shrimp suppliers. The case fits well in a discussion and analysis of the (welfare) consequences of protectionism, the basic case for free trade, and the political economy of protectionism.

This note discusses the welfare implications of tariffs for consumers, producers, and the government. A brief survey of the state of protectionism in recent years is included.

The theory of comparative advantage is a surprisingly common-sense idea, but it is often misunderstood. In this technical note the basic theory of comparative advantage is presented with an example that drives home its logic when there are technological differences between countries. In addition, we look at some extensions that specify other sources of comparative advantage, as well as some related theories.