Fig. 7.

(A) Regression coefficients for the price index of coal, oil, and natural gas for non-OECD (blue) and OECD (red) countries for the time period 1978–2011. (B) Regression coefficients for endowments with coal for non-OECD (blue) and OECD (red) countries. Specifications include all countries (all obs.), excluding those for which all reserves are zero (excl. all zeros), and those for which some but not all reserves are zero (excl. zero for some) for the time period 1972–2011. Squares indicate point estimates, and lines indicate the 90% confidence interval.