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Khaliq ur Rehman Cheema Popular answer

Dear,

Here you may found some valuable material.

http://aje.oxfordjournals.org/content/early/2011/11/22/aje.kwr258.full

Ariel Linden

I believe you can use a Fourier transform for your regression. Go to this Stata FAQS that gives an example. Let me know if you need further followup.

http://www.stata.com/support/faqs/mata/discrete-fast-fourier-transform/

Ariel

Khaliq ur Rehman Cheema