I had a problem with my data of growth in percentage regarding negative and positive values due to which I could not transform it into log and get rid of heteroskedasticity issue. However, I found out another way to get rid of negative values i.e. adding a constant with each variable (I guess, I did it right. Would you like to comment?)

Moreover,

I have run a linear-log regression model i.e.

y = a + b1log(x1) + b2log(x2) + e

The regression model has run and it has no problem of autocorrelation and heteroskedasticity. However, I am having problem in interpreting the results as the unit of data of all the variables is in percentage growth.

The method to interpret is;

A 1% increase in X is associated with an average b/100 units increase in Y.

But, how can I say it in my case as my data is already in percentage growth form?

Please suggest.

Regards,

Bilal Ahmed