This gives rise to a proliferation of tax havens to evade tax liability. The continuation and progress of capital accumulation depends on the removal of obstacles to the expansion of trade, and this has historically often been a violent process. As markets expand, more and more new opportunities develop for accumulating capital, because more and more types of goods and services can be traded in. But capital accumulation may also confront resistance, when people refuse to sell, or refuse to buy (for example a strike by investors or workers, or consumer resistance). Capital accumulation as social relation "Accumulation of capital" sometimes also refers in Marxist writings to the reproduction of capitalist social relations (institutions) on a larger scale over time, i.e., the expansion of the size of the proletariat and of the wealth owned by the bourgeoisie. This interpretation emphasizes that capital ownership, predicated on command over labor, is a social relation: the growth of capital implies the growth of the working class (a "law of accumulation"). In the first volume of Das Kapital Marx had illustrated this idea with reference to Edward Gibbon Wakefield's theory of colonisation: In the third volume of Das Kapital, Marx refers to the "fetishism of capital" reaching its highest point with interest-bearing capital, because now capital seems to grow of its own accord without anybody doing anything. In this case, Markets with social influence Product recommendations and information about past purchases have been shown to influence consumers choices significantly whether it is for music, movie, book, technological, and other type of products. Social influence often induces a rich-get-richer phenomenon (Matthew effect) where popular products tend to become even more popular. See also Business cycle Capitalist mode of production (Marxist theory) Charity (practice) Commodity fetishism Constant purchasing power accounting Culture of capitalism Dual-sector model History of capitalist theory Internal contradictions of capital accumulation Investment-specific technological progress Matthew effect Preferential attachment Prices of production Primitive socialist accumulation Productive and unproductive labour Proletarianization Property income Relations of production Return on capital Simple commodity production Surplus value The rich get richer and the poor get poorer Unearned income Unequal exchange Value investing Notes References Michel Aglietta, A Theory of Capitalist Regulation. Elmar Altvater, Gesellschaftliche Produktion und ökonomische Rationalität; Externe Effekte und zentrale Planung im Wirtschaftssystem des Sozialismus. Samir Amin, Accumulation on a World Scale. Philip Armstrong, Andrew Glyn and John Harrison, Capitalism since World War II. Das Kapital: