21. In Ecological Economics value theory is separated into two types : Donor-type value and receiver-type value. 22. Green Economics is different from but builds on some aspects of environmental economics and ecological economics . 23. The term has been used in politics, in anthropology, in international development and in ecological economics . 24. Daily is a board member at the Beijer Institute for Ecological Economics and the Nature Conservancy. 25. There should really be better stuff in textbooks on ecological economics ( distinguished from environmental economics ). 26. In practice, ecological economics focuses primarily on the key issues of uneconomic growth and quality of life. 27. Georgism is related to the school of ecological economics , since both propose market based restrictions for pollution. 28. Kapp was among the forerunners of ecological economics and one of the leading 20th century institutional economists. 29. Ecological economics has become the field of study most closely linked with the concept of a steady-state economy.30. According to ecological economist Malte Faber, ecological economics is defined by its focus on nature, justice, and time.