*This paper originates from my many conversations with fellow academics in marketing research, who all knew of the Koyck model, but almost none of which knew that Koyck was a Dutchman, let alone that he was affiliated to what is now called the Erasmus University Rotterdam. I thank Teun Kloek for many helpful suggestions, and for providing me with part of the material of Table 2, and Paul de Boer for helpful comments.

Additional Metadata
Keywords Koyck model, sales-advertising relationship
Persistent URL dx.doi.org/10.1111/j.1467-9574.2004.00266.x, hdl.handle.net/1765/13352
Journal Statistica Neerlandica
Franses, Ph.H.B.F. (2004). Fifty years since Koyck (1954). Statistica Neerlandica, 58(4), 381–387. doi:10.1111/j.1467-9574.2004.00266.x