1. A method of determining an economic impact of business policies, comprising: a) providing player definitions defining a plurality of players and an associated set of rules defining a decision space, a decision-making process tree, an information set, an outcome function, and a payoff function for each player; b) translating, in a computer system, the player definitions into at least one codified script; and c) executing, in the computer system, the at least one codified script, wherein a result of the outcome and payoff functions at the end of execution of a script stage determines the economic impact of the business policies defined by the rules.