Introspective interviewing can often determine the magnitude of relations more meaningfully than statistical analysis. Deduction from empirically validated premises avoids many research design problems. Guesswork can be combined with sensitivity analysis to determine the effects of guesses and missing information on conclusions. (Author/DWH)

Threshold analysis (TA) is introduced as an evaluation model. TA converts unknown variables into questions as to whether a given benefit, cost, or success probability is more or less than a threshold, above which the proposed project would be profitable, and below which it would be unprofitable. (Author/PN)

In this context, ethics refers to a set of normative standards for resolving dilemmas that policy analysts or evaluators often face with regard to what they should do in performing their roles in the interests of societal desirability. The dilemmas relate to: (1) prediction versus prediction plus prescription; (2) evaluation versus evaluation plus…