Green urban areas: evaluation and analysis of public spending for management. Some cases study in Florence

The present article focuses on seven different types of urban parks located in Florence in order to define their costs (indirect supply) and their benefits (direct demand): it has been divided into two parts; first one focus on the costs of technical interventions. Normally the costs of maintaining are readily calculated and conspicuous, therefore it would be necessary to realize a data-base that documents public green areas, playgrounds and tree stocks. The second part focus on the assessment of human wellbeing connect to their green urban areas fruition: a contingent valuation has been used in order to give a value to green areas human fruition.