Knowledge that Transforms

Empirical studies have overwhelmingly shown that a lower child mortality rate leads to lower fertility. Yet it has not been possible to satisfactorily analyze this relationship in even the simplest theoretical models. This paper attempts to bridge this gap between theory and the empirical literature. The paper also presents results on the effects of child mortality changes on parental welfare. The analysis captures the dynamic stochastic feature of fertility choice, subsumes other endogeneous choices (e.g., the quality of the children), and treats the number of children as a discrete variable (this added realism is important for the analysis).

The hypothesis that price discrimination based on willingness-to-pay for quality can occur in multifirm markets is confirmed using microdata on gasoline retailing. A test that discriminates between price structures associated with discrimination and with cost-driven, competitive differentials is developed and implemented with controls for variation in outlet and market characteristics. A second test based on profitability variation rejects a competitive, peak-load pricing explanation for the observed price dispersion. The data suggest that price discrimination at the retail level adds at least nine cents a gallon to the average price of full-service gasoline.

This paper constructs a dynamic general equilibrium model in which economic growth is explained by the evolution of the division of labor. The relationships among the accumulation of human capital, the evolution of the division of labor, endogenous comparative advantage, trade dependence, the market structure, and economic growth are investigated.

An endogenous growth model is developed that produces convergence in per capita income and growth rates of output. Agents have identical preferences and access to identical technologies of production and investment, but differing levels of initial human capital. A spillover effect of human capital in the investment technology provides below-average human capital agents with a higher rate of return on investment than above-average human capital agents. Thus, below-average human capital agents grow faster than above-average human capital agents. This model explains income convergence of the developed world, regional income convergence within the United States, and intergenerational mobility.

The authors develop a model of vintage human capital in which each technology requires vintage-specific skills. They examine the properties of a stationary equilibrium for their economy. The stationary equilibrium is characterized by an endogenous distribution of skilled workers across vintages. The distribution is shown to be single-peaked. Under general conditions, there is a lag between the appearance of a technology and its peak usage, a phenomenon known as diffusion. An increase in the rate of exogenous technological change shifts the distribution of human capital to more recent vintages, thereby increasing the diffusion rate.

The ability of individuals to move freely from one jurisdiction to another is generally seen as a constraint on the amount of redistribution that each jurisdiction within a system of governments can undertake. In this paper, we look at this proposition by developing a positive analysis of income redistribution by local governments in a federal system. We ask how much redistribution occurs when only local governments can have tax/transfer instruments, individuals can move freely among jurisdictions, and voters in each jurisdiction are fully aware of the migration effects of redistributive policies. Local redistribution is shown to induce sorting of the population, with the poorest households located in the communities that provide the most redistribution. While the threat of out-migration affects the potential for redistribution, our results suggest that significant local redistribution is nonetheless feasible. Numerical computations indicate that the proportion of residents who are renters is a major factor affecting the local choice of level of redistribution.

This paper develops a dynamic general equilibrium model of economic growth. The model has a steady-state equilibrium in which some firms devote resources to discovering qualitatively improved products and other firms devote resources to copying these products. Rates of both innovation and imitation are endogenously determined on the basis of the outcomes of $R & D$ races between firms. Innovation subsidies are shown to unambiguously promote economic growth. Welfare is enhanced, however, only if the steady-state intensity of innovative effort exceeds a critical level.

Differences in local fiscal conditions generate compensating differentials across local land and labor markets just as the authors have known amenities to do. Thus, the local fiscal climate affects the quality of life across metropolitan areas. The authors present new results showing that intercity fiscal differentials are nearly as important as amenity differentials in determining the quality of life across urban areas. The paper also investigates the sensitivity of the quality-of-life rankings with respect to assumptions about the nature of the marginal entrant. The authors estimate a random effects model to account for city-specific error components in the housing and wage regressions.

A Beckerian model of household production is developed to study the cyclical allocation of capital and time between market and home activities. The adopted framework treats the business and household sectors symmetrically. In the market, labor interacts with business capital to produce market goods and services, and likewise at home the remaining time (leisure) is combined with household capital to produce home goods and services. The model presented is parameterized and simulated to see whether it can rationalize the observed allocation of capital and time, as well as other stylized facts, for the postwar U.S. economy.

Cigarette demand equations accounting for tolerance, reinforcement, and withdrawal are derived using the Becker-Murphy model of rational addiction and are estimated using data from the second National Health and Nutrition Examination Survey. Estimates imply that smoking is addictive, individuals are not myopic, and price increases would reduce demand. Implications concerning time preference and addiction are tested by estimating the demand separately for samples based on age and education. Less educated (younger) individuals are found to behave more myopically than more educated (older) individuals, whereas more addicted (myopic) individuals are found to respond more to price, in the long run, than less addicted (myopic) individuals.