<P> Sometimes, moral and natural goods can conflict . The value of natural "goods" is challenged by such issues as addiction . The issue of addiction also brings up the distinction between economic and moral goods, where an economic good is whatever stimulates economic growth . For instance, some claim that cigarettes are a "good" in the economic sense, as their production can employ tobacco growers and doctors who treat lung cancer . Many people would agree that cigarette smoking is not morally "good", nor naturally "good," but still recognize that it is economically good, which means, it has exchange value, even though it may have a negative public good or even be bad for a person's body (not the same as "bad for the person" necessarily--consider the issue of suicide .) </P> <P> In Ecological Economics value theory is separated into two types: Donor - type value and receiver - type value . Ecological economists tend to believe that' real wealth' needs a donor - determined value as a measure of what things were needed to make an item or generate a service . (H.T. Odum 1996). An example of receiver - type value is' market value', or' willingness to pay', the principal method of accounting used in neo-classical economics . In contrast both, Marx's Labour Theory of Value and the' Emergy' concept are conceived as donor - type value . Emergy theorists believe that this conception of value has relevance to all of philosophy, economics, sociology and psychology as well as Environmental Science . </P> <P> Intuitively, theories of value must be important to ethics . A number of useful distinctions have been made by philosophers in the treatment of value . </P> <P> Many people find it useful to distinguish instrumental value and intrinsic values, first discussed by Plato in the "Republic". An instrumental value is worth having as a means towards getting something else that is good (e.g., a radio is instrumentally good in order to hear music). An intrinsically valuable thing is worth having for itself, not as a means to something else . It is giving value intrinsic and extrinsic properties . </P>

When does a value become a moral value