Duchy of Massa and Carrara Genoa. Alberico I brought large urban restructurations in the cities of Carrara and Massa, mainly for prestige reasons. Both cities were equipped with new city walls - with representative functions, rather than military, since the policy of the territory was not expansionist - and new ducal palaces. In Carrara was established the Office of Marble (1564), to regulate the marble mining industry. The city of Massa, in particular, saw much of its plan redesigned (new roads, plazas, intersections, pavings) in order to make it worthy of an Italian country's capital. The War of Spanish Succession (1701–1714) was the beginning of
Economic region of production that increases in both capital and labour are required to produce a given fixed quantity of output. The ridge lines are the combination of points where marginal product (MP) of one of the factors is zero. The theory entails that there is a limit to how much one factor can be substituted for another. When production reaches a point where substitution between the factors becomes impossible (MP), the isoquant becomes positively sloping. No rational entrepreneur will operate at a point outside the ridge lines (Region of Economic Nonsense). Economic region of production In economics, the economic region of production is