Assessing the Effect of Bilateral Collaborations on Learning Outcomes

Despite recent interest in the effects of student-driven collaborations on learning outcomes, little or no empirical investigations examine the potential benefits from collaboration between instructors of separate, but related, courses. This study proposes a learning intervention that explicitly accounts for interdependencies across courses and extends the traditional definition of collaborative learning to include the synthesis of teaching and learning in four courses through bilateral, group activities between instructors and among students. A student-performance measure assesses the intervention. Statistical results suggest that the collaborative learning intervention improved student-writing performance.     

The effects of air quality regulations on the location decisions of pollution-intensive manufacturing plants

This research examines the effects of the 1977 Clean Air Act Amendments (CAAA) on the location decisions of pollution-intensive manufacturing plants. We develop a panel data set to analyze plant births of polluting manufacturers over time as a function county-level attainment status of the federal standard for ozone pollution. We find that more stringent county-level environmental regulations impact pollution-intensive capital flows through deterring new plant births. We also find that the impact of stricter regulations varies by pollution-intensity of manufacturers, with results suggesting that federal guidelines have a greater impact on high pollution intensive manufacturers than more moderate polluters.      

Economies of scale and trade policy: The median voter model revisited

Why do some political economy models perform so poorly in predicting actual trade policy? Do scale economies provide the missing puzzle to our understanding of the anti-trade bias? By integrating economies of scale in production, this paper theoretically reinstates the median voter model as in Mayer [Mayer, W. (1984). Endogenous tariff formation. The American Economic Review, 74, 970–985] as a suitable political economy model in predicting trade policy. The modified model generates the scope for the anti-trade bias and predicts that sometimes economic, rather than political, considerations may lead to restrictive trade.     

REINVENTING THE WHEEL? AFRICAN COOPERATIVES IN A LIBERALIZED ECONOMIC ENVIRONMENT

ABSTRACT ** :  Cooperative development in Africa can be said to have traversed two main eras: the era of state control and that of liberalization. The first era lasted up to the early 1990s and saw the origin and substantial growth of cooperatives on the continent. During that period, different models of cooperative development were introduced on the continent. We distinguish a unified cooperative model, a social economy model, a social movement model, a producers' model and an indigenous model. But in all cases, cooperatives were engulfed into state politics. However, little is known about the impact of liberalization measures on these models. Our research in 11 African countries reveals that cooperatives in Africa have survived the market forces and continued to grow in number and membership. We see a slow but sure erosion of the unified model and the adoption of a social economy model. Cooperatives in Africa are re-examining their organizational forms and diversifying their activities in response to members' interests and needs.     

Stock market development and economic growth: Evidence from seven sub-Sahara African countries

The paper examines the long run and causal relationship between stock market development and economic growth for seven countries in sub-Saharan Africa. Using the autoregressive distributed lag (ARDL) bounds test, the study finds that the stock market development is cointegrated with economic growth in Egypt and South Africa. Moreover, this test suggests that stock market development has a significant positive long run impact on economic growth. Granger causality test based on vector error correction model (VECM) further shows that stock market development Granger causes economic growth in Egypt and South Africa. However, Granger causality in the context of VAR shows evidence of bidirectional relationship between stock market development and economic growth for Cote D’Ivoire, Kenya, Morocco and Zimbabwe. In Nigeria, there is a weak evidence of growth-led finance using market size as indicator of stock market development. Based on these results, the paper argues that stock markets could help promote growth in Africa. However, to achieve this goal, African stock markets need to be further developed through appropriate regulatory and macroeconomic policies.     

How useful are signals? A micro-structure analysis

We analyze how the market processes a signaling event by studying a sample of self-tender offers, events often viewed as signals of firm value. By examining changes in the degree of informed trading, we find asymmetric information costs fall at announcement, remain low throughout the event, and increase at offer expiration. By one month following expiration, informed trading returns to a level not significantly different from that prior to the offer. Higher risk firms have significantly larger declines in information asymmetry during the offer. Increases in information asymmetry persist one month following expiration for firms with lower pre-offer informed trading. (JEL G14, G32)