In our study we found that picking the right weighting method at times doubles portfolio returns. But, paradoxically, we found no significant differences between returns achieved through naïve and scientific weighting methods. Nevertheless, we dismissed the hypothesis that portfolio weightings...

We study the size and drivers of non-standard errors (Menkveld et al., 2021) in portfolio sorts across 14 common methodological decision nodes and 40 sorting variables. These non-standard errors range between 0.05 and 0.26 percent and are, on average, larger than standard errors. Supposedly...

This research investigates the influence of methodological choices in portfolio sorts on the size of the carbon premium. By analyzing more than 100,000 methodological paths, we find that variations in the construction of brown-minus-green portfolios create substantial non-standard errors. From...