when do you calculate the coefficient of an annual change how do you find the effect of each subsample and the time period? what is the normal rate of an increase in a year why i find the coefficients of regression more statistically significant than over a full period? when do you find effects of a subsample when do you find statistically significant data how do you find the effect of x$ on y$? does the coefficients change when the panel is smaller when using a panel regression, do you find the coefficients of change when to use panel data in regression how to use regression in a panel how does data represent a subsample of a regression panel why are the coefficients for regression not significant how do i find effects for subset and panel data why is it necessary to use a regression panel? how to get an estimate of an average increase in an entire time period how do you calculate the effect of y on y when comparing regressions, should the average change the x-y-y how to find statistically significant results using data panel how would i find the statistical significance of the effect over each sample