Suchergebnisse

Lecture 1: Microeconomic structure -- Lecture 2: Macroeconomic implications

"This paper is the first attempt to structurally estimate the impact of globalization on markups and welfare in a monopolistic competition model. To achieve this, we work with a class of preferences that allow for endogenous markups and firm entry and exit that are especially convenient for empirical work - the translog preferences, with symmetry in substitution imposed across products. Between 1992 and 2005 we find the U.S. market experienced a series of changes that confirm the predictions of Melitz and Ottaviano (2008): import shares rose and U.S. firms exited, leading to a fall in markups, while product variety and welfare went up. We estimate the impacts of these effects on a national level, and find a cumulative drop of 5.4 percent in merchandise prices and of 1.0 percent in overall consumer prices between 1992 and 2005. Although the magnitude of the welfare gains in our translog setup is similar to that obtained by assuming CES preferences, the sources of these gains are quite different. Variety gains under translog are at least one-third smaller than in the CES case, but there is a substantial reduction in U.S. markups, resulting in a comparable welfare gain overall"--National Bureau of Economic Research web site

Once unquestionably the world's leading economic and industrial power, the United States now views with growing dismay the impressive industrial efficiency, vigorous work ethics, and large American holdings of various other nations. Is the United States truly lagging in its ability to compete effectively in world markets? Concern over this question has been voiced in both the business and government sectors, as well as by academic economists. A recent conference, sponsored by the National Bureau of Economic Research, explored the effects of trade policies on a nation's ability to compete in in

Economists disagree on whether recent U.S. trade policies are harmful or helpful, but they all agree that there is a new trend toward focusing on results-oriented policies in specific markets and with particular trading partners. These twelve essays by leading international economists explore crucial issues in U.S. trade policy today. Topics examined include the markets for automobile and automobile parts in the United States and Japan, the U.S. response to "unfair" trading practices such as dumping, and the effects of industry- and country-specific policies. Examples include high-technology a

Since the early 1980s, the U.S. economy has experienced a growing wage differential: high-skilled workers have claimed an increasing share of available income, while low-skilled workers have seen an absolute decline in real wages. How and why this disparity has arisen is a matter of ongoing debate among policymakers and economists. Two competing theories have emerged to explain this phenomenon, one focusing on international trade and labor market globalization as the driving force behind the devaluation of low-skill jobs, and the other focusing on the role of technological change as a catalyst

"In this paper we develop a monopolistic competition model where firms exercise their market power across multiple products. Even with CES preferences, markups are endogenous. Firms choose their optimal product scope by balancing the net profits from a new variety against the costs of "cannibalizing" their own sales. With identical costs across firms, opening trade leads to fewer firms surviving in each country but more varieties produced by each of those firms. With heterogeneous costs, the number of firms surviving in equilibrium is quite insensitive to the market size. When trade is opened, more firms initially enter, but the larger market size reduces the cannibalization effect and expands the optimal scope of products. As a result, the less efficient firms exit, and the larger market is accommodated by more efficient firms that produce more varieties per firm on average"--National Bureau of Economic Research web site

"In the second-half of the 1990s, the positive impact of information technology on productivity growth for the United States became apparent. The measurement of this productivity improvement depends on hedonic procedures adopted by the Bureau of Labor Statistics (BLS) and Bureau of Economic Analysis (BEA). In this paper we suggest a new reason why conventional hedonic methods may overstate the price decline of personal computers. We model computers as a durable good and suppose that software changes over time, which influences the efficiency of a computer. Anticipating future increases in software, purchasers may "overbuy" characteristics, in the sense that the purchased bundle of characteristics is not fully utilized in the first months or year that a computer is owned. In this case, we argue that hedonic procedures do not provide valid bounds on the true price of computer services at the time the machine is purchased with the concurrent level of software. To assess these theoretical results we estimate the model and find that before 2000 the hedonic price index constructed with BLS methods overstates the fall in computer prices. After 2000, however, the BLS hedonic index falls more slowly, reflecting the reduced marginal cost of acquiring (and therefore marginal benefit to users) of characteristics such as RAM, hard disk space or speed"--National Bureau of Economic Research web site