How to test the statistical significance of the difference of two
univariate Linear Regression betas?

Hi all,

There are two samples of data: D1 and D2.

On data D1 we do a univariate Linear Regression and get the coefficient
beta1.

On data D2 we do a univariate Linear Regression and get the coefficient
beta2.

How do I test the statistical significance of (beta1-beta2)?

Could you please recommend packages/commands in R for doing this?

Thanks a lot!

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