The Cobb-Douglas utility function is a specific mathematical form that can be used to represent an individual's preferences, for example as an alternative utility function for Karim. It is given by the formula $u(t,c) = t^\alpha c^\beta$, where the exponents $\alpha$ and $\beta$ are positive constants. This function is noted for having convenient mathematical properties, making it common in economic analysis. It is named after the two people who introduced the function to the field of economics.