Add 'Discount Initial Year Cashflow' parameter for Excel-style NPV calculation [v3.8.4]#55

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softwareengineerprogrammer merged 16 commits intomainfrom

Mar 19, 2025

Commits on Mar 12, 2025

numpy-financial NPV test in test_economics
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Add Cashflow Series Start Year parameter to enable NPV calculation parity with Excel/Google Sheets/etc.
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fix incorrect parameter dict declaration
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sync cashflow series start year test npv test values
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Switch from integer 'Cashflow Series Start Year' to boolean 'Discount Initial Year Cashflow' to match Excel's (simpler) convention, which does not treat cash outlays spread over multiple initial ye…
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regenerate schema with Discount Initial Year Cashflow
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Bump version: 3.8.0 → 3.8.1
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Commits on Mar 14, 2025