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I am currently working on a project where I want to explore how changes in a couple of currencies affects the income for my countrys exported fish. My country (Norway) sells it fish in 4 different currencies (USD, EUR, GBP and YEN), so I have made a price index involving this four currencies. For an example, a norwegian company will earn more if USD/NOK = 10 compared to if USD/NOK = 8.

My goal at the end is to compare our total income with the price index to see how changes in the currencies affects our income (in R).

I have a lot of data for many years available, including:

  1. Montly Price index
  2. Monthly income of exported fish
  3. Monthly quantity of exported fish

My problem is that the monthly income of the exported fish is seasonal. For an example, the income is always lower in april then in october. The reason for this, can for an example be that we sell the fish more expensive in october then april because the market is always better in october.

Because some of the changes in our income is seasonal, it will give me fake results. Does anybody know how I can fix this problem? Will the value of income/quantity fix the problem?

Thanks

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    $\begingroup$ Welcome to Economics:SE. Thank you for your question; please consider revising it to be more in line with our community expectations. Like many other stacks, we expect questions to provide evidence of prior research. That helps us to understand the question, and avoids our repeating work you've already done. Our help center, and other stacks provide additional resources to assist with revisions. $\endgroup$
    – 1muflon1
    Feb 23 at 14:50
  • $\begingroup$ Q: Why are you using a price index? You have the four exchange rates, so you can calculate the krone price for fish sold in Japan, the krone price for fish sold in U.K., etc. $\endgroup$
    – Daniel
    Feb 26 at 16:43

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