The article gives an updated review on how the PWYW mechanism is conceptually defined and how it has been empirically analysed so far. The objective is to get an in-depth understanding of the state of research from the point of view of marketing, especially regarding how empirical verification of PWYW is conducted. In doing so, several insights on how to further research this phenomenon from the point of view of marketing are given.
Multi-asset options are options with payoffs affected by at least two underlying instruments. These instruments can be assets such as stocks, indices, currencies or commodities. An important factor infl uencing values of multi-asset options is correlation among log-returns of underlying assets. Thus the options are also called correlation options. In the paper there are presented description and models for pricing selected correlation options: quotient, product, spread and two-color rainbow options. There are also given some examples of their use on the grain market in Poland.
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