OLS multivariate beta
From OPOSSEM
<math>\beta_{XY} = \frac {N \sum_{i=1}^NX_iY_i - ( \sum_{i=1}^NX_i)(\sum_{i=1}^NY_i)}{N \sum_{i=1}^NY_i^2 - \sum_{i=1}^NX_i}</math>
Need to check denominator?
<math>\beta_{XY} = \frac {N \sum_{i=1}^NX_iY_i - ( \sum_{i=1}^NX_i)(\sum_{i=1}^NY_i)}{N \sum_{i=1}^NY_i^2 - \sum_{i=1}^NX_i}</math>
Need to check denominator?