<P> Semi-periphery countries usually surround the core countries both in a physical and fundamental sense . The semi-periphery countries act as the middle men between the core and the periphery countries - by giving the wealthy countries what they receive from the poor countries . The periphery countries are the poorer countries usually specializing in farming and have access natural resources - which the core countries use to profit from . </P> <P> In order for a country to remain a core or to become a core, possible investors must be kept in mind when nation's policies are planned . Core countries change with time due to many different factors including changes in geographic favoritism and regional affluence . Alterations in financing plans by companies will also play a part as they change to react to the continuously evolving world market . </P> <P> In order for a country to be considered a core country nominee, the country must possess an independent, stable government and potential for growth in the global market and advances in technology . Although these three factors will not completely decide where a company chooses to invest--they do play extremely large roles in such decisions . A main key to becoming or remaining a core is determined by the country's government policies to encourage funding from outside . </P> <P> The main function of the core countries is to command and financially benefit from the world system better than the rest of the world . Core countries could also be viewed as the capitalist class while the periphery countries could be viewed as a disordered working class . In a capitalism - driven market, core countries exchange goods with the poor nations at an unequal rate greatly in favor of the core countries . </P>

According to world systems analysis the u.s. japan and germany are all core nations