The substitutability between free and slave labor is examined, and the permissibility of aggregating the two in to a single labor variab le is investigated, using a translog production function. Slaves on large cotton farms worked in gangs; free labor was not observed to do so. Despite this, previous research has aggregated free and slave labor, and employed functional forms imposing strong restrictions on substitution. Estimation of the translog function shows that simple additive aggregation is not acceptable; on large farms, slaves and free labor were complements, while on small, nongang farms, they were substitutes.

This paper analyzes the joy of giving bequest motive in which the utility obtained from leaving a bequest depends only on the size of the bequest. It exploits the fact that this formulation can be interpreted as a reduced form of an altruistic bequest motive to derive a relation between the value of the altruism parameter and the value of the joy of giving parameter. Using previous discussions of an a priori range of plausible values for the altruism parameter we then derive plausible restrictions on the joy of giving parameter. We demonstrate that this parameter may well be orders of magnitude larger than assumed in the existing literature.

Using panel data for rural South India, a fixed-effects individual wage equation and farm production function are estimated that have calorie intake and nutritional status (weight-for-height) of workers as their arguments. Neither market wages, nor farm output, are observed to be responsive to changes in the daily energy intake of workers. However, both are highly elastic with respect to weight-for-height. These results suggest that, while the human body can adapt to inadequate nutrition in the short run, it cannot adapt as readily to chronic malnutrition that eventually results in loss of weight-for-height.

The effects of technological opportunity, market demand and RD with respect to productivity growth, it is not possible to distinguish demand and technological opportunity effects, but spillovers are important.

The authors examine how the strategic aspect of Japanese research and development expenditures and industrial policies affected U.S.-Japanese bilateral trade during the late 1970s, and investigate which component of R&D--expenditures on process innovation, product quality improvements, new products and new technology, or technology transfer--proved to be most effective. They find that while Japanese R&D expenditures have generally promoted Japan's trade advantage, certain components of R&D have proved more effective than other. The depreciation subsidy and special status with the Ministry of International Trade and Industry is positively related to the Japanese trade performance, while legal cartelization status has not had any apparent effect.

Randal R. Rucker, Keith B. Leffler, To Harvest or Not to Harvest? An Analysis of Cutting Behavior on Federal Timber Sales Contracts, The Review of Economics and Statistics, Vol. 70, No. 2 (May, 1988), pp. 207-213

This study examines how errors in measuring marginal attribute pric es vary with the form of the hedonic price function. In simulations, consumers with known utility functions bid for houses with given attributes. Various forms of the hedonic function are estimated using equilibrium housing prices. Errors in estimating marginal attribute prices are calculated by comparing each consumer's equilibrium marginal bid vector with the gradient of the hedonic function. When all attributes are observed, linear and quadratic Box-Cox forms produce lowest mean percentage errors; however, when some attributes are unobserved or are replaced by proxies, linear and linear Box-Cox functions perform best.