Do national borders and ethnicity contribute to market segmentation between and within countries? This paper uses …, and in line with important characteristics of African economies, we investigate the role of ethnicity in mitigating and … exacerbating the border effect. We find that a common ethnicity is linked to lower price dispersion across countries, yet ethnic …

's (1957) seminal work on employer discrimination - something which has not previously been done in the large economics … criticisms and extensions of the standard Becker model, including an argument of our own which, like some recent work, shows that …

fundamental challenges faced by empirical work in this area. Specifically, for work devoted to measuring whether and how much … of study. For work seeking to arbitrate empirically between the two main alternative theoretical explanations for such … recent and much less common. We highlight problems with both approaches. Throughout, we discuss recent work, which, the …