Results are available in the literature of p-truncated models as p \ rightarrow \ infty which provide asymptotic inference for the deviation of the estimated parametric function from the true parametric function and also asymptotic tests for regression effects and asymptotic confidence regions.
2.
In fact, I have long believed that the placebo effect is nothing more than a regression effect, " referring to a well-known statistical observation that patients who feel particularly terrible one day will almost invariably feel better the next day, no matter what is done for them.
3.
Some authors use the " Sports Illustrated " cover jinx as an example of a regression effect : extremely good performances are likely to be followed by less extreme ones, and athletes are chosen to appear on the cover of " Sports Illustrated " only after extreme performances.