- 20 - B. The Role of Subsistence Standards and Levels of Living A previous article [Wharton, 1963b] sought to clarify the ambiguous use of the term "subsistence" by distinguishing between "subsistence production" and "subsistence levels of living." Though both "subsistence production" and "sub- sistence living" frequently coincide, they are not necessarily synonymous. A model was presented to explain how minimum standards of subsistc e li"vi are determined at any point in time and how they are changed through time. The model was intended as an aid in describing and analysing the influence of mini- mum standards of subsistence living at the micro-economic and individual farm family level. The model may be briefly summarized. S In any given socio-economic unit, there exists some social consensus as to the standard minimum bundle of goods required per person per specified period of time. The bundle is above the level needed for physical survival, i.e., no marked deterioration causing death prior to the normal life span in that particu- lar social economic unit. The absolute size and composition of such a bundle is bounded on its lower side by the physiologic limiting requirements for human survival, but the values above the lower limit are controlled by economic-socio- cultural factors. There are subjective notions of minimum subsistence standards of living and the content of a minimum standard varies between social aggregates depending upon historical and current economic-cultural factors. The higher the previous economic levels of well-being historically, the higher will be the cur- rent subsistence living standards. Such a variable can be viewed as operating in some lagged fashion, i.e., the current minimum standard is some function of previous economic levels weighted in some fashion. Thus, a short-run drop in