Unitary states and peripheral regions: a model of heterogeneous spatial clubs

Efficiency explanations of the wealth and size of nations provide useful insights into the history and current makeup of nations. We focus here on two related issues that matter, for instance, in large areas such as Western or Eastern Europe, or Canada. We develop an analytical framework for understanding the limits of constitutional unity. This microeconomic model of unitary states deals with two kinds of heterogeneity. First, preference distance or physical distance account for decreasing net benefits from expansion. Second, heterogeneity may involve a discontinuity in the spatial pattern of preferences: “peripheral behaviors” threaten unity. We integrate such behaviors into the model and draw some lessons as to the nature of an optimal constitutional area, discussing in particular the status of peripheral regions.     

Allele frequencies of 15 short tandem repeats (STRs) in three Egyptian populations of different ethnic groups

DNA typing of 15 short tandem repeat (STR) loci included in the AmpFlSTR Identifiler PCR amplification kit (Applied Biosystems), was carried out in three Egyptian populations of different ethnic groups: the Berbers from the Siwa oasis (in the North-Western Egyptian desert), the Muslims and the Copts from Adaima (Upper Egypt). A total of 297 individuals were typed. After Bonferroni's correction, no deviations from the Hardy-Weinberg equilibrium were observed for all samples at the 15 STR loci. All loci are highly polymorphic and population differentiation tests showed that 7, 10 and 8 out of 15 loci have significant differences between the Berbers and the Muslim samples, between the Berbers and the Copts, and between the two samples from Adaima, respectively. Comparative analyses between our population data and other geographically related populations gathered from the literature were performed.