Simulation is a particular type of modelling.
A model aeroplane is recognisably a plane, even if it is much smaller than a real aeroplane and has none of its complex control systems. More relevant to social science are statistical models which are used to predict the values of dependent variables. Chapter 2 describes the idea of modelling and the differences between statistical models and simulation models in detail. Often, the inputs are the attributes needed to make the model match up with some specific social setting and the outputs are the behaviour of the model through time. Suppose that we are interested in how people choose a partner to marry.