Using Experimental Research to Test Instructional Effectiveness: A Case Study

Cross-cultural competence is now regarded as a critical student learning outcome by many U.S. higher educational institutions. It requires in part that students be able to empathize with people whose ethno-cultural, economic, political, and/or geographic backgrounds are different from their own—a quality that we are labeling global empathy. Yet colleges and universities frequently find it difficult to develop global empathy among their students. We conducted an experiment to investigate whether different instructional techniques—traditional lecture, video news reports, and an online game—or undergraduate students’ academic majors are associated with variations in indicators of global empathy. Statistically significant variations in survey data were found only among students majoring in psychology and in responses to two survey questions. Two behavioral measures did not reveal any statistically significant variation. A larger sample, longer exposure to treatment condition, or other changes to the experimental design might elucidate stronger evidence that instructional method or undergraduate academic major affects the development of global empathy, but this type of research may not be feasible at colleges and universities where enrollments are small and faculty lack necessary resources.     

A Bayesian stochastic frontier: an application to agricultural productivity growth in European countries

This paper measures and compares total factor productivity (TFP) growth in agriculture for the European Union (EU) countries and candidate countries (CC), in order to distinguish and investigate cross-country differences in agricultural productivity growth rates from 1993 to 2006. A stochastic production frontier model is estimated using a Bayesian approach capturing country-specific time-invariant heterogeneity and country-specific time-varying inefficiency. Agricultural productivity growth is found to be mostly driven by technological change. The TFP growth rates of the EU-12 countries and CC are about twice the EU-15 growth rate. Catch-up in productivity levels is observed between EU-15 and EU-12 as well as between EU-15 and CC. The results are compared for a situation in which country-specific time-invariant heterogeneity is not taken into account.