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α: calibrated so average coauthorship-adjusted count equals average raw count
Previous research has shown that economic growth should help to reduce the rate of poverty. However, a number of recent studies have found that the economic expansion of the 1980s had no statistically significant effect on aggregate poverty. It is shown that both a Threshold regression and a Fourier approximation provide a better empirical model of poverty than the standard linear model. It is noteworthy that the nonlinear specifications show a large and significant effect on poverty of the 1980s expansion.