Knowledge that Transforms

This paper uses the housing market to develop estimates of the local welfare impacts of Superfund-sponsored cleanups of hazardous waste sites. We show that if consumers value the cleanups, then the hedonic model predicts that they will lead to increases in local housing prices and new home construction, as well as the migration of individuals that place a high value on environmental quality to the areas near the improved sites. We compare housing market outcomes in the areas surrounding the first 400 hazardous waste sites chosen for Superfund cleanups to the areas surrounding the 290 sites that narrowly missed qualifying for these cleanups. We find that Superfund cleanups are associated with economically small and statistically insignificant changes in residential property values, property rental rates, housing supply, total population, and types of individuals living near the sites. These findings are robust to a series of specification checks, including the application of a regression discontinuity design based on knowledge of the selection rule. Overall, the preferred estimates suggest that the local benefits of Superfund cleanups are small and appear to be substantially lower than the $43 million mean cost of Superfund cleanups.

This paper studies the choice of electoral rules and in particular the question of minority representation. Majorities tend to disenfranchise minorities through strategic manipulation of electoral rules. With the aim of explaining changes in electoral rules adopted by U.S. cities, particularly in the South, we show why majorities tend to adopt "winner-take-all" city-wide rules (at-large elections) in response to an increase in the size of the minority when the minority they are facing is relatively small. In this case, for the majority it is more effective to leverage on its sheer size instead of risking conceding representation to voters from minority-elected districts. However, as the minority becomes larger (closer to a fifty-fifty split), the possibility of losing the whole city induces the majority to prefer minority votes to be confined in minority-packed districts. Single-member district rules serve this purpose. We show empirical results consistent with these implications of the model in a novel data set covering U.S. cities and towns from 1930 to 2000.

In the 1988–2004 microdata collected by the U.S. Bureau of Labor Statistics for the Consumer Price Index, price changes are frequent (every 4–7 months, depending on the treatment of sale prices) and large in absolute value (on the order of 10%). The size and timing of price changes vary considerably for a given item, but the size and probability of a price change are unrelated to the time since the last price change. Movements in aggregate inflation reflect movements in the size of price changes rather than the fraction of items changing price, because of offsetting movements in the fraction of price increases and decreases. Neither leading time-dependent models (Taylor or Calvo) nor first-generation state-dependent models match all of these facts. Some second-generation state-dependent models, however, appear broadly consistent with the empirical patterns.

We use heterogeneity in the timing of television's introduction to different local markets to identify the effect of preschool television exposure on standardized test scores during adolescence. Our preferred point estimate indicates that an additional year of preschool television exposure raises average adolescent test scores by about 0.02 standard deviations. We are able to reject negative effects larger than about 0.03 standard deviations per year of television exposure. For reading and general knowledge scores, the positive effects we find are marginally statistically significant, and these effects are largest for children from households where English is not the primary language, for children whose mothers have less than a high school education, and for nonwhite children.

Under inflation, targeting estimates of the indexation parameter in hybrid New Keynesian Phillips curves are either equal to zero, or very low, in the United Kingdom, Canada, Sweden, and New Zealand. Analogous results hold for the Euro area under the European Monetary Union, and for Switzerland under the new monetary regime: under stable regimes with clearly defined nominal anchors, inflation appears to be purely forward-looking. These results question the notion that the intrinsic inflation persistence found in post-WWII U.S. data is structural in the sense of Lucas (Carnegie-Rochester Conference Series on Public Policy, 1 [1976], 19–46), and suggest that "hardwiring" inflation persistence in macroeconomic models is potentially misleading.

Research on information economics and securities markets dating back to Stigler (Journal of Political Economy, 69 (1961), 213–225; Journal of Business, 37 (1964), 117–142) argues that trading will tend to centralize in major market centers such as the New York Stock Exchange (NYSE). The NYSE's recent mergers with Archipelago and Euronext bring questions about the viability and effects of competition between stock exchanges to the policy forefront. We examine the largely forgotten but unparalleled episode of competition between the NYSE and the Consolidated Stock Exchange of New York (Consolidated) from 1885 to 1926. The Consolidated averaged 23% of NYSE volume for approximately forty years by operating a second market for the most liquid securities that traded on the Big Board. Our results suggest that NYSE bid-ask spreads fell by more than 10% when the Consolidated began to trade NYSE stocks and subsequently increased when the Consolidated ceased operations. The empirical analysis suggests that this historical episode of stock market competition improved consumer welfare by an amount equivalent to US$9.6 billion today.

We propose a simple theoretical model of supervised learning that is potentially useful to interpret a number of empirical phenomena relevant to the nature-nurture debate. The model captures a basic trade-off between sheltering the child from the consequences of his mistakes and allowing him to learn from experience. We characterize the optimal parenting policy and its comparative-statics properties. We then show that key features of the optimal policy can be useful to interpret provocative findings from behavioral genetics.

In a model with heterogeneity in managerial talent, we compare the economic and political consequences of reforms aimed at reducing fixed costs of entry (deregulation) and improving the efficiency of financial markets (financial reform). The effects of these reforms depend on the market where control rights over incumbent firms are traded. In the absence of a market for control, both reforms increase the number and the average quality of firms, and are politically equivalent. When a market for control exists, financial reform induces less entry than deregulation, and endogenously compensates incumbents, thereby encountering less political opposition from them. Using this result, we show that financial reform may be used in the short run to open the way for future deregulation. Our model sheds light on the privatization and reform experiences of formerly planned economies as well as on the observed path of reforms in economies of the Organisation for Economic Co-operation and Development.

We examine the effect of regionalism on unilateral trade liberalization using industry-level data on applied most-favored nation (MFN) tariffs and bilateral preferences for ten Latin American countries from 1990 to 2001. We find that preferential tariff reduction in a given sector leads to a reduction in the external (MFN) tariff in that sector. External liberalization is greater if preferences are granted to important suppliers. However, these “complementarity effects” of preferential liberalization on external liberalization do not arise in customs unions. Overall, our results suggest that concerns about a negative effect of preferential liberalization on external trade liberalization are unfounded.

We argue that a contract provides a reference point for a trading relationship: more precisely, for parties' feelings of entitlement. A party's ex post performance depends on whether he gets what he is entitled to relative to outcomes permitted by the contract. A party who is shortchanged shades on performance. A flexible contract allows parties to adjust their outcomes to uncertainty but causes inefficient shading. Our analysis provides a basis for long-term contracts in the absence of noncontractible investments and elucidates why “employment” contracts, which fix wages in advance and allow the employer to choose the task, can be optimal.