| 单词 | ordinary least squares |
| 释义 | ordinary least squares = (OLS) The simplest linear regression technique. OLS involves fitting a linear equation with the coefficients chosen to minimize the sum of squares of residual errors. In estimating systems of simultaneous equations, where the left-hand variable of each equation appears as a right-hand variable in others, OLS produces biased results, and is replaced by two-stage least squares, or more sophisticated methods of estimation. |
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