Both have been relatively consistent with selection.
In the 1950 sample, the coefficient is negative and statistically significant in each specification for blacks and becomes larger in absolute value as more covariates are added to the model, a pattern consistent with selection into high-wage metropolitan areas.
This theory is consistent with selection of the number of frost days for the 300 Index as this variable controls the duration over which trees can grow during the year.
For blacks, each IV estimate of the coefficient on the proportion Southern is larger in absolute value than its corresponding OLS estimate, also consistent with selection into high-wage areas.
In total, 627 abstracts were screened (Fig. 1): 492 records were excluded at abstract screening, mainly because they did not include a measure of PSD consistent with selection criteria or because the main health condition was not migraine.
The evidence presented so far is consistent with selection into high wage areas: including covariates or instrumenting for immigration decreases the estimated wage effects, and the coefficients on the proportion Southern black in the native white regression samples are positive.
Such large errors are consistent with selection of the wrong target.
These results may be consistent with selection for sex specific reduction or exclusion of Wolbachia from testes.
This conclusion is consistent with selection maintaining the arrangement polymorphism due to fitness benefits conferred by coadapted gene complexes, which are maintained by suppressed recombination between arrangements.
Although purifying selection operates to minimize variability, the hypervariable regions show evidence of strong directional selection, possibly consistent with selection applied to the msp2 of A. phagocytophilum.
In the Hmong-Mien and Altaic populations, the extended haplotype homozygosity (EHH) and relative EHH (REHH) tests for the ADH1B core were consistent with selection for the haplotype with derived SNP alleles.
