The results of the reform, however, fell short of initial expectations, as growth was mostly the result of increased investment, rather than the new system of control. As a result, the reform plan was altered in 1967–1968, with the implementation of the "Economic System of Socialism". The ESS was implemented through so-called structure-determining areas, strategic sectors which enjoyed preferential access to funds and resources. Those initially included chemicals, engineering and electronics, but as enterprises lobbied the government for inclusion in the list of strategically important projects, the list grew ever longer.