In addition, the price of these commodities was decided by supply and demand, and as such it can be considered that 'Anglo-Saxon' model of development started well before the 1970s as market could already influence some elements of the model. One of the reasons why market economics became popular at that time is 'emergency conversion(s)', which is, disastrous events that made changes to the society that force them trade in the marketplace.[14] These are the changes that members of the society make in order to survive.