Average treatment effects for stayers with correlated random coefficient models of panel data

Correlated random coefficient (CRC) models provide a useful framework for estimating average treatment effects (ATE) with panel data by accommodating heterogeneous treatment effects and flexible patterns of selection. In their simplest form, they lead to the well-known difference-in-differences estimator. CRC models yield estimates of ATE for “movers” (i.e., cross-sectional units whose treatment status changed over time) while ATE for “stayers” (i.e., cross-sectional units who retained the same treatment status over time) are not identified. We study additional restrictions on selection into treatment that lead to the identification of ATE for stayers by an extrapolation from quantities identified by the CRC model. We discuss estimation and testing of the extrapolation's validity, then use our results to estimate the returns to agricultural technology adoption among maize farmers in Kenya.     

The Government‐Sponsored Enterprises and the Mortgage Crisis: The Role of the Affordable Housing Goals

I use regression discontinuity analysis to measure the effect of one of the Affordable Housing Goals, the Underserved Areas Goal (UAG), on the number of whole single‐family mortgages purchased by Fannie Mae and Freddie Mac (GSEs) in undeserved census tracts for 1996–2002. Focusing additionally on tracts that became UAG‐eligible in 2005–2006, I measure the effect of the UAG during peak years for the subprime market. The results suggest a small UAG effect and challenge the view that the goals caused the GSEs to supply substantially more credit to high‐risk borrowers than they otherwise would have supplied during the subprime boom.     

Is ‘Good’ governance good for business? A cross-national analysis of firms in African countries

Good governance can reduce uncertainty, transaction, search and production costs, and ultimately affect firm performance. In this paper, we explore the link between good governance and the profitability of individual firms in African countries. We employ the governance indices developed at the World Bank and assemble a sample of companies from 21 countries over four years. Contrary to prior research that found a negative association between institutional development and profitability, our evidence shows that an improvement of good governance in countries currently with low levels of governance ratings has greater positive effects on the firm profitability than a similar improvement in countries with relatively higher ratings of good governance. Good governance reduces the variability of the company's profitability, leading to high-return and low-risk investments. Finally, we find that the role of good governance depends upon the country's income level. When the income level is lower, an improvement in public governance is more likely to impact firm performance than when the income level is relatively higher. Good governance is more important for the stability of the profitability of firms in countries with higher levels of good governance ratings than lower ratings.     

The Discouraging Effect of Risks in WTO Negotiations: Determinants and Perceived Changes

The observation has frequently been made that uncertainty about the legal meaning and the economic and political effects of WTO agreements exert a discouraging effect on the progress of multilateral trade negotiations. This article identifies the determinants of uncertainty and risk in the WTO. It also examines changes in these determinants over time, pointing to increasing levels of uncertainty and risk. The argument is based on a series of interviews conducted with members of national delegations to the WTO and with WTO employees.     

Technological Change and Transition: Relative Contributions to Worldwide Growth During the 1990s*

In this paper we use the Kumar and Russell [American Economic Review (2002) Vol. 92, pp. 527–548] growth‐accounting procedure to examine cross‐country growth during the 1990s. Using a data set comprising developed, newly industrialized, developing and transitional economies, we decompose the growth of output per worker into components attributable to technological catch‐up, technological change and capital accumulation. In contrast to the study by Kumar and Russell, which concludes that capital deepening is the major force of growth and change in the world income per worker distribution over the 1965–90 period, our analysis shows that, during the 1990s, the major force in the further divergence of the rich and the poor is due to technological change, whereas capital accumulation plays a lesser and opposite role. Finally, although on average we find that transitional economies perform similar to the rest of the world, the procedure is able to discover some interesting patterns within the set of transitional countries.     

Measuring potential gains from reallocation of resources

In this work we consider the case when efficient operation of individual economic units does not necessarily imply efficiency for a group of these units. Merging theoretical findings of Li and Ng (Int Adv Econ Res, 1995, 1, 377.) and Färe and Zelenyuk (Eur J Oper Res, 2003, 146, 615), we develop new group-wise efficiency indexes that measure the extent to which the performance of a group of economic units can be enhanced, even if all these units are individually efficient. The existence of such potential improvement is attributed to non-optimal allocation of inputs across the individual economic units from the point of view of a group of these units.     

Testing the Empirical Relationship between Best Management Practice Adoption and Farm Profitability

Several "best management practices" (BMPs) aimed at reducing movement of nutrients, pesticides, and sediment into surface water resources have been developed and promoted by Extension and other agencies over the past several years. This study utilizes actual farm-level economic and BMP adoption data to rigorously analyze the relationship between BMP use and farm profitability. Results indicate that adoption of nutrient BMPs has a significant positive effect on net farm income (NFI) for wheat and corn, while herbicide BMP adoption, particularly use of BMPs related to the application of atrazine on corn, has a small (but statistically significant) negative impact on income. Adoption of soil conservation BMPs is not shown to have a statistically significant impact on farm income.     

Slack-based directional distance function in the presence of bad outputs: theory and application to Vietnamese banking

In this paper we extend the slack-based directional distance function introduced by Färe and Grosskopf (Eur J Oper Res 200(1):320–322, 2010) to measure efficiency in the presence of bad outputs and illustrate it through an application on data of Vietnamese commercial banks. We also compare results from the slack-based directional distance function relative to the directional distance function, the enhanced hyperbolic efficiency measure (Färe et al. in Rev Econ Stat 71(1):90–98, 1989) and the Farrell-type technical efficiency and confirm that it has greater discriminative power.