This paper considers an extension of the usual Gompertz curve by allowing the parameters to vary over the seasons. This means that, for example, saturation levels can be different over the year. An estimation and testing method is proposed and illustrated with an example.

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Keywords Gompertz curves, saturation levels, seasonality
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Series ERIM Article Series (EAS)
Journal Technological Forecasting and Social Change
Franses, Ph.H.B.F. (1994). Gompertz curves with seasonality. Technological Forecasting and Social Change, 287–297. doi:10.1016/0040-1625(94)90051-5