This approach treats time as the only factor in determining the fair distribution of equity. Slicing pie has a much more realistic set of methods based on the

This approach treats time as the only factor in determining the fair distribution of equity. Slicing pie has a much more realistic set of methods based on the principle that a person's % share of the equity should always be equal to that person's share of the at-risk contributions. The method has been road tested by dozens of startups and I'm in the midst of using it for a new startup and find it to be quite approachable. If you are interested in some research behind optimizing cooperative systems, check out Shapley Value. Shapley Value assigns a unique distribution (among the players) of a total surplus generated by the coalition of all players. The Shapley value is characterized by a collection of desirable properties https://en.m.wikipedia.org/wiki/Shapley_value https://en.m.wikipedia.org/wiki/Shapley_value