ENGLISH 183 NON-PROBABILITY SAMPLING F: ECHANTILLONNAGE NON PROBABILISTE S: MUESTREO NO PROBABILISTICO Methods of sampling in which the probability of a particular individual being included in the sample is not known. Compare PROBABILITY SAMPLING. F: DONNEES STANDARD S: DATOS ESTANDAR INPUT-OUTPUT DATA for an ACTIVITY or FARM indicating the expected level of achievement for a defined technology under specified levels (e.g., high, average of low) of MANAGEMENT 185 OBJECTIVE FUNCTION F: FUNCTION OBJECTIF S: FUNCTION OBETIVO A mathematical function expressing the relationship between some objective which is to be optimized and the variables on which it depends. 186 OPERATING CAPITAl, TENANT'S CAPITAL F: CAPITAL D'EXPLOITATION S: CAPITAL DE EXPLOTACION TOTAL FARM CAPITAL less the improved land value of the land in the FARM. It allows inter-farm comparisons of performance without regard to tenure. 187 OPERATION F: TACHE 8: LABOR, OPERATION A specific task within an ACTIVITY, e.g. usually associated with a power input. 188 OPPORTUNITY COST ploughing. It is F: COUT D'OPPORTUNITE S: COSTO DE OPORTUNIDAD The cost of any choice as measured by the value of the best alternative foregone. Thus the opportunity cost of a RESOURCE is its value in its best alternative use. For practical purposes, when considering a whole economic unite the opportunity cost is often defined as the market value. PAGE 37 184 NORM DATA