From the wild swings of the stock market to the online auctions of eBay to the unexpected twists of the world's post-Communist economies, markets have suddenly become quite visible. We now have occasion to ask, "What makes these institutions work? How important are they? How can we improve them?"

Taking us on a lively tour of a world we once took for granted, John McMillan offers examples ranging from a camel trading fair in India to the $20 million per day Aalsmeer flower market in the Netherlands to the global trade in AIDS drugs. Eschewing ideology, he shows us that markets are neither magical nor immoral. Rather, they are powerful if imperfect tools, the best we've found for improving our living standards. A New York Times Notable Book. W. W. Norton & Company

Oil Boom: Peril or Opportunity? Sub-Saharan Africa is in the midst of an oil boom as foreign energy companies pour billions of dollars into the region for the exploration and production of petroleum. African governments, in turn, are receiving billions of dollars in revenue from this boom. Oil production on the continent is set to double by the end of the decade and the United States will soon be importing 25 percent of its petroleum from the region. Over $50 billion, the largest investment in African history, will be spent on African oil fields by the end of the decade.

The new African oil boom -- centered on the oil-rich Atlantic waters of the Gulf of Guinea, from Nigeria to Angola -- is a moment of great opportunity and great peril for countries beset by wide-scale poverty. On the one hand, revenues available for poverty reduction are huge; Catholic Relief Services (CRS) conservatively estimates that sub-Saharan African governments will receive over $200 billion in oil revenues over the next decade. On the other hand, the dramatic development failures that have characterized most other oil-dependent countries warn that petrodollars have not helped developing countries to reduce poverty; in many cases, they have actually exacerbated it.

Africa's oil boom comes at a time when foreign aid to Africa from industrialized countries is falling and being replaced by an emphasis from donor nations on trade as a means for African countries to escape poverty. The dominance of oil and mining in Africa's trade relationships, coupled with this decline in aid flows, means that it is especially vital that Africa make the best use of its oil.

CRS is committed to helping to ensure that Africa's oil boom improves the lives of the poor through increased investment in education, health, water, roads, agriculture and other vital necessities. But for this to occur, these revenues must be well managed. Thus, this report addresses two fundamental questions: How can Africa's oil boom contribute to alleviating poverty? What policy changes should be implemented to promote the management and allocation of oil revenues in a way that will benefit ordinary Africans?

Capital-account liberalization was once seen as an inevitable step along the path to economic development for poor countries. Liberalizing the capital account, it was said, would permit financial resources to flow from capital-abundant countries, where expected returns were low, to capital-scarce countries, where expected returns were high. The flow of resources into the liberalizing countries would reduce their cost of capital, increase investment, and raise output (Stanley Fischer, 1998; Lawrence H. Summers, 2000). The principal policy question was not whether to liberalize the capital account, but when -- before or after undertaking macroeconomic reforms such as inflation stabilization and trade liberalization (Ronald I. McKinnon, 1991). Or so the story went.

In recent years, intellectual opinion has moved against liberalization. Financial crises in Asia, Russia, and Latin America have shifted the focus of the conversation from when countries should liberalize to if they should do so at all. Opponents of the process argue that capital account liberalization does not generate greater efficiency. Instead, liberalization invites speculative hot money flows and increases the likelihood of financial crises with no discernible positive effects on investment, output, or any other real variable with nontrivial welfare implications (Jagdish Bhagwhati, 1998; Dani Rodrik, 1998; Joseph Stiglitz, 2002). While opinions about capital-account liberalization are abundant, facts are relatively scarce.

This paper tries to increase the ratio of facts to opinions. In the late 1980's and early 1990's a number of developing countries liberalized their stock markets, opening them to foreign investors for the first time. These liberalizations constitute discrete changes in the degree of capital-account openness, which allow for a positive empirical description of the cost of capital, investment, and growth during liberalization episodes.

Figure 1 previews the central message that the rest of this paper develops in more detail. The cost of capital falls when developing countries liberalize the stock market. Since the cost of capital falls, investment should also increase, as profit-maximizing firms drive down the marginal product of capital to its new lower cost. Figure 2 is consistent with this prediction. Liberalization leads to a sharp increase in the growth rate of the capital stock. Finally, as a direct consequence of growth accounting, the increase in investment should generate a temporary increase in the growth rate of output per worker. Figure 3 confirms that the growth rate of output per worker rises in the aftermath of liberalization.

While the figures do no harm to the efficiency view of capital-account liberalization, a number of caveats are in order. For example, it is legitimate to interpret a fall in the dividend yield (Fig. 1) as a decline in the cost of capital, if there is no change in the expected future growth rate of dividends at the time of liberalization. But stock-market liberalizations are usually accompanied by other economic reforms that may increase the expected future growth rate of output and dividends (Henry, 2000a, b). Because liberalizations do not occur in isolation, it is important to think carefully about how to interpret the data. Neoclassical theory provides a good starting point for framing the issues.

In its relations with Peru, the United States has historically placed greatest emphasis on fighting the war on drugs. As Sendero Luminoso, The Shining Path, led an insurgency against the Peruvian government in the 1980s and 1990s, the United States provided ample support against the terrorists located in the jungle, especially those participating in the drug trade. But Peru's victory over terrorism then was due more to improved police intelligence and increased public investment, rather than success in the war on drugs. Now, in the midst of economic troubles and a difficult transition back to democracy in Peru, the Shining Path has made a resurgence. The United States again faces a choice about how to proceed - to continue focusing on the war on drugs or to provide sustained levels of investment in Peru's economy and political institutions, thereby turning this war on terror into a war on poverty.