Not OP, but white text on black (especially at 100% contrast) is harder to read than black text on white. Monospace is harder to read than natural-width text. Large passages of text with both features is fatiguing to read.

Black text on white background with no backlight is easier to read. Think black text on paper.

When it comes to computer screens, usually set too bright to accommodate varying ambient lightning conditions throughout the day/year, it's not as simple, and I am not sure there is a study to confirm it.

And even if so, any individual's case might be different.

> white text on black is harder to read than black text on white

not my experience (I prefer not to be flashbanged), but sure