1 “... on trends in the evolution and volatility of ratios of price indexes composed of multiple commodities...”

2 “... differences in factor intensities across countries with different ratios of skilled labor over unskilled labor...”

3 “... effects of these programs are lower when controlling for utilization ratios and selection biases due...”

4 “... on trends in the evolution and volatility of ratios of price indexes composed of multiple commodities...”

5 “... point increase in the ratio of trade over gross domestic product is associated with a short-run increase...”