Hypotheses testing concerning relationships between spot prices of various types of coffee

In this paper hypotheses are tested concerning long-run relationships between the four indicator prices of coffee. These relationships are assumed to exist based on a previous study of the coffee market by the same author. The four coffee prices are investigated in more detail in this paper. After a brief introduction to the price formation on the coffee market the univariate properties of the coffee prices are checked first. Then the tests for co-integration, as developed by Johansen (1988) and Johansen and Juselius (1989) are performed. These tests appear to be very informative with respect to the way the prices may be linked in the long run, concerning the number and the form of the relationships. Specifications of three equilibrium relationships among the coffee prices are detected and commented.