Will African Agriculture Survive Climate Change?

Measurement of the likely magnitude of the economic impact ofclimate change on African agriculture has been a challenge.Using data from a survey of more than 9,000 farmers across 11African countries, a cross-sectional approach estimates howfarm net revenues are affected by climate change compared withcurrent mean temperature. Revenues fall with warming for drylandcrops (temperature elasticity of –1.9) and livestock (–5.4),whereas revenues rise for irrigated crops (elasticity of 0.5),which are located in relatively cool parts of Africa and arebuffered by irrigation from the effects of warming. At first,warming has little net aggregate effect as the gains for irrigatedcrops offset the losses for dryland crops and livestock. Warming,however, will likely reduce dryland farm income immedia-tely.The final effects will also depend on changes in precipitation,because revenues from all farm types increase with precipitation.Because irrigated farms are less sensitive to climate, wherewater is available, irrigation is a practical adaptation toclimate change in Africa.     

Reciprocal Supervision,Collusion and Organizational Design

We study the design of supervisory functions in an organization with one principal and two agents. Each agent can perform supervision activities regarding the other agent. We characterize the way the principal must structure incentive payments to avoid any collusive activity between agents. In particular, it is shown that better mutual information between agents may hurt the principal. The other main result is the possibility that it may be better to give up one supervisory function or to have a third party be the supervisor if possible. Finally, we show that such a dual supervisory structure raises the possibility that letting collusion happen may be the best policy.     

Earnings Announcements and Information Asymmetry: An Intra‐Day Analysis*

This paper examines the effect of earnings announcements on information asymmetry as perceived by specialists. We use changes in quoted bid‐ask spreads and depths (relative to the average value in the non‐announcement period) as proxies for changes in information asymmetry in the market. To our knowledge, we are the first to employ a model that captures the simultaneous nature of the specialists' choice of spreads and depths in reaction to earnings news. We provide evidence that spreads are wider and depths are smaller before the release of earnings announcements. We also find that changes to depths are greater for announcements of quarterly earnings than for announcements of annual earnings and changes to spreads persist longer into the post‐announcement period when announcements are made outside trading hours. These changes to spreads and depths persist when earnings announcements are made after trading hours.     

An economic analysis of the use of student evaluations: implications for universities

In this paper, we develop an analytical model of joint maximizing behavior on the part of students and professors to develop policy rules for universities who use student evaluations as tools for increasing professor effort and, thereby, student knowledge. More precisely, we examine the potential benefits of student evaluations, the consequences of over‐emphasizing them and the optimal level of emphasis that should be placed on them. This exercise allows us to determine conditions under which student evaluations would result in an increase in teaching effort and student knowledge, and environments where it would result in professors manipulating grading schemes to obtain higher student ratings, i.e., grade inflation. Copyright © 2003 John Wiley & Sons, Ltd.     

Bank capitalization and lending behavior after the introduction of the Basle Accord

In this paper, we provide evidence that banks with a low level of capitalization have reduced their commitment with respect to lines of credit after the introduction of the Basle Accord. A bank's lending behavior reflects its level of commitment towards borrowers, which in turn affects the level of effort it exerts on screening and monitoring the activities of borrowers. We find that the post-Basle Accord market reaction to the announcement of lines of credit issued by banks with a low level of capitalization is significantly lower than the reaction to other types of bank credit announcements. We interpret this result as evidence that some banks have a low level of commitment associated with lines of credit after the Basle Accord.

Has the CDS market influenced the borrowing cost of European countries during the sovereign crisis?

This paper assesses the potential influence of the growing CDS market on the borrowing cost of sovereign states during the European sovereign crisis. We analyze the sovereign debt market to ascertain the pattern of information transmission between the CDS and corresponding bond markets. Our methodological innovation is the use of a non-linear specification rather than the linear VECM specification customarily employed. Using a panel smooth transition model during the 2008–2010 period, we find that: 1) linearity tests clearly reject the null hypothesis of a linear transmission mechanisms between the bond and the CDS markets; 2) market distress alters the mutual influence and 3) the higher the distress the more the CDS market dominates the information transmission between CDS and bond markets.     

TESTING FOR PRO-POORNESS OF GROWTH, WITH AN APPLICATION TO MEXICO

This paper proposes techniques to test for whether growth has been pro-poor. We first review different definitions of pro-poorness and argue for the use of methods that can generate results that are robust over classes of pro-poor measures and ranges of poverty lines. We then provide statistical procedures that rely on the use of sample data to infer whether growth has been pro-poor in a population. We apply these procedures to Mexican household surveys for 1992, 1998, and 2004. We find strong normative and statistical evidence that Mexican growth has been absolutely anti-poor between 1992 and 1998, absolutely pro-poor between 1998 and 2004 and between 1992 and 2004, and relatively pro-poor between 1992 and 2004 and between 1998 and 2004. The relative assessment of the period between 1992 and 1998 is statistically too weak to lead to a robust evaluation of that period.     

Labour Demand Adjustment: Does Foreign Ownership Matter?

This paper examines whether multinationals differ in their employment adjustment from domestic companies, using a panel of 5,544 Belgian firms observed between 1998 and 2005. More precisely, we estimate labour adjustment costs by worker and firm types. We propose a new flexible specification that takes into account the role of firm size in adjustment costs. Our results indicate that adjusting white‐collar employment is around half as costly for multinational firms (MNFs) as for domestic firms of the same size. The remaining differential in adjustment costs between MNFs and domestic firms might result, among other things, from multinationals' stronger bargaining power.     

Towards constructive design feedback dialogues: guiding peer and client feedback to stimulate children’s creative thinking

International Journal of Technology and Design Education - Design feedback is an essential pedagogical tool that can help young novice designers navigate divergent and convergent paths while...