Interpretation of Linear Log Model

[jespersweden]

HI guys,

I have some issues with interpreting one of my independent variables. The setup is as follows:

Independent variable: log of R&D expenses
Dependent variable: profit margin in decimal format (e.g. 0.13 and not 13 %)

How do interpret the beta coefficient of the independent variable in this case? And which formula should I use for this? So far I have been thinking that it measures the expected percentage unit change in financial performance for a percentage change in R&D expenses by using the formula: BETA/100. But I am a bit unsure, since my dependent variable are in decimal format of a percentage number, should I multiply with 100 as well and thus, the formula will only be BETA?

Thanks for all help you can provide!

Regards,
Jesper