Carrara marble Carrara marble Carrara marble is a type of white or blue-grey marble of high quality, popular for use in sculpture and building decor. It is quarried in the city of Carrara located in the province of Massa and Carrara in the Lunigiana, the northernmost tip of modern-day Tuscany, Italy. Carrara marble has been used since the time of Ancient Rome. In the 17th and 18th centuries, the marble quarries were monitored by the Cybo and Malaspina families who ruled over Massa and Carrara. The family created the "Office of Marble" in 1564 to regulate the marble mining industry. The city
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