SFEcon contends that the dynamics of economics require nothing beyond what is already demonstrated as sufficient to describe the dynamics of any systematic behavior. The question as to whether the economy can or should be analyzed as a system (as well as SFEcon’s special incompetence in formulating such analyses) has been given what we consider its due on our discussions pages. We proceed in the conviction that further discussions in this vein are pointless until economic science recognizes one specimen of its causality in a properly realized dynamic system. Absent such a specimen, there is just no possibility of knowing what we are talking about.

Our case for dynamic modeling emphasizes the credibility attained by other disciplines when their causality came to be expressed in objective mechanisms capable of presenting intrinsic behaviors that are oblivious to verbal dispute. We offer a little review of numerical methods in order to establish the technique by which mechanistic behaviors can be modeled by computational analogs such as kinetic videogames. The idea of mathematical delay is represented by the two elementary mechanisms used in constructing Model 0.

A minimal array of physical and monetary flows is set forth in order to define the state variables of an economic system. At minimum, the economy’s physical state S must entail the amount of every commodity J in the employ of every sector I in every economy K as these levels vary with time t. A continuous representation of S_IJKt is our sine qua non for a macroeconomic model.

The physical flows being continually resolved in Model 0’s physical state take place at current prices, and are therefore always giving rise to the monetary flows controlling our financial state variables. The economy’s financial state and commodity prices are co-definitional, but their mutual dynamic cannot be explicated until the mechanisms controlling physical flows are established. The model needs to know where it is on its production functions in order to compute the gradients required by its price computations. Prices must therefore continue to be accepted as given until the economy’s physical flows are established in this segment.