Knowledge that Transforms

Is there too much or too little research and development (R&D)? In this paper we bridge the gap between the recent growth literature and the empirical productivity literature. We derive in a growth model the relationship between the social rate of return to R&D and the coefficient estimates of the empirical literature and show that these estimates represent a lower bound. Furthermore, our analytic framework provides a direct mapping from the rate of return to the degree of underinvestment in research. Conservative estimates suggest that optimal R&D investment is at least two to four times actual investment.

Using data on the prices of capital goods, this paper shows that much of the benefit of investment tax incentives does not go to investing firms but rather to capital suppliers through higher prices. A 10 percent investment tax credit increases equipment prices 3.5–7.0 percent. This lasts several years and is largest for assets with large order backlogs or low import competition. Capital goods workers' wages rise, too. Instrumental variables estimates of the short-run supply elasticity are around 1 and can explain the traditionally small estimates of investment demand elasticities. In absolute value, the demand elasticity implied here exceeds 1.

We use data on health plan choices by employees of Harvard University to compare the benefits of insurance competition with the costs of adverse selection. Moving to a voucher-type system induced significant adverse selection, with a welfare loss of 2 to 4 percent of baseline spending. But increased competition reduced Harvard’s premiums by 5 to 8 percent. The premium reductions came from insurer profits, so while Harvard was better off, the net effect for society was only the adverse selection loss. Adverse selection can be minimized by adjusting voucher amounts for individual risk. We discuss how such a system would work. Governments are increasingly turning to market forces as a way to limit the cost of social insurance. Traditionally, social insurance programs were operated as nonmarket goods; govern-ments mandated participation in a central program, collected revenues to finance the program, and ran the insurance system. There was no role for competition among suppliers in providing the basic benefit.

Research using U. S. manufacturing data finds that job destruction fluctuates more over time than job creation, but some new data indicate that this behavior is not shared in growing sectors, where job creation varies more. An explanation for this finding based on the interaction between (S,s)-type adjustment and trend employment growth delivers some tight predictions for the relationship between trend growth and the volatility of creation relative to destruction. Although it scores some notable successes, the simple (S,s)-based model augmented with a low-frequency trend cannot fully account for the strength of the empirical relationship between relative gross-flow volatility and trend growth across one-digit industries.

We develop a theory of the ownership of firms in an environment without secure property rights against state encroachment. “Private ownership” leads to excessive revenue hiding, and “state ownership” (i.e., national government ownership) fails to provide incentives for managers and local governments in a credible way. Because “local government ownership” integrates local government activities and business activities, local government may better serve the interests of the national government, and thus local government ownership may credibly limit state predation, increase local public goods provision, and reduce costly revenue hiding. We use our theory to interpret the relative success of local government-owned firms during China's transition to a market economy.

Do firms become more efficient after becoming exporters? Do exporters generate positive externalities for domestically oriented producers? In this paper we tackle these questions by analyzing the causal links between exporting and productivity using plant-level data. We look for evidence that firms' cost processes change after they break into foreign markets. We find that relatively efficient firms become exporters; however, in most industries, firms' costs are not affected by previous exporting activities. So the well-documented positive association between exporting and efficiency is explained by the self-selection of the more efficient firms into the export market. We also find some evidence of positive regional externalities.

Preferential trading arrangements are analyzed from the viewpoint of the “new political economy” that views trade policy as being determined by lobbying of concentrated interest groups. Two conclusions are reached: first, that trade-diverting preferential arrangements are more likely to be supported politically; and second, that such preferential arrangements could critically change domestic incentives so multilateral liberalization that is initially politically feasible could be rendered infeasible by a preferential arrangement. The larger the trade diversion resulting from the preferential arrangement, the more likely this will be the case.

This paper examines the effect of skill-biased technological change as measured by computerization on the recent widening of U. S. educational wage differentials. An analysis of aggregate changes in the relative supplies and wages of workers by education from 1940 to 1996 indicates strong and persistent growth in relative demand favoring college graduates. Rapid skill upgrading within detailed industries accounts for most of the growth in the relative demand for college workers, particularly since 1970. Analyses of four data sets indicate that the rate of skill upgrading has been greater in more computer-intensive industries.

Salesperson and executive compensation contracts typically specify a nonlinear relationship between firm revenues and pay. These agents therefore have incentive to manipulate prices, influence the timing of customer purchases, and vary effort over their firms' fiscal years. This paper empirically establishes results consistent with agents' focusing on performance over the fiscal year. Most notably, in addition to varying with the calendar business cycle, manufacturing firms' sales are higher at the end of the fiscal year, and lower at the beginning, than they are in the middle. Further evidence is found in fiscal-year price movements and patterns in the industry variation of fiscal-year effects.

The more liquid a firm's assets, the greater their value in a short-notice liquidation. It is generally thought that a firm should find it easier to raise external finance against more liquid assets. This paper focuses on the dark side of liquidity: greater asset liquidity reduces the firm's ability to commit to a specific course of action. As a result, greater asset liquidity can, in some circumstances, reduce the firm's capacity to raise external finance. Firms with “excessively” liquid assets are in the best position to finance illiquid projects. This leads us to a theory of financial intermediation and disintermediation based on the liquidity of assets.