Thus, the positive correlation between higher earnings and education levels may reflect innate ... leading to inaccurate or biased correlations between education and earnings. Too limited a focus: A ...

But identifying whether the correlation between two or more variables represents a causal relationship ... leading to inaccurate or biased correlations between education and earnings. Too limited a ...

Second, the estimates of the regression coefficients are not as efficient as they would be if the autocorrelation were taken into account. Third, since the ordinary regression residuals are not ...