Tuscany along the coastal strip (Livorno and Pisa areas), where there are also important chemical industries. Also of note are the marble (Carrara area) and paper industries (Lucca area). Tuscany is a traditionally popular destination in Italy, and the main tourist destinations by number of tourist arrivals are Florence, Pisa, Montecatini Terme, Castiglione della Pescaia and Grosseto. Additionally, the Chianti region, Versilia and Val d'Orcia are also internationally renowned and particularly popular spots among travellers. As far as seaside tourism is concerned, which represents 40% of tourist arrivals in the region, Castiglione della Pescaia's sea has been repeatedly nominated as Italy's
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