This paper explores the circumstances under which extremely discounted usability engineering techniques produce results that are worthwhile to researchers and practitioners. We present a method for usability analysis where an entire evaluation can be conducted in only thirty minutes, an amount of time we suggest as perhaps the smallest possible unit of analysis (or quantum) for complete usabili...

The valuation process that economic agents undergo for investments with uncertain payoff typically depends on their statistical views on possible future outcomes, their attitudes toward risk, and, of course, the payoff structure itself. Yields vary across different investment opportunities and their interrelations are difficult to explain. For the same agent, a different discounting factor has ...

Background: Discounting Approaches Discounting is generally defined as the process of comparing the values of costs and benefits that occur at different times. Approaches to choosing discount rates are generally placed into two categories. The descriptive approach matches discount rates to descriptions of how society discounts taken from monetary interest rates observed in financial markets. Th...

This research proposes a mathematical model in piecewise objective integer with quadratic programming to accommodate discount purchase, holding and transport costs on an integrated inventory control supplier selection problem. The proposed can be used determine the optimal decision, specifically, quantity of product ordered by decision maker stored should have minimal effect total cost. To eval...

de Kok et al. (1) recently reported the cost-effectiveness of human papillomavirus vaccination in the netherlands and argued that human papillomavirus vaccination is not a cost-effective preventive measure in the netherlands. They calculated a discounted (annual rate 3%) incremental cost-effectiveness ratio (IcER) of €53 500 per qualityadjusted life-year (Qaly), which is clearly higher than the...

Intertemporal preferences are di¢ cult to measure. We estimate time preferences using a structural bu¤er stock consumption model and the Method of Simulated Moments. The model includes stochastic labor income, liquidity constraints, child and adult dependents, liquid and illiquid assets, revolving credit, retirement, and discount functions that allow short-run and longrun discount rates to di¤e...

Subjective Discount Rates, Intergenerational Transfers and the Return to Schooling Using a dynamic programming model of schooling decisions, we investigate the relationship between subjective discount rates and the labor market ability (the discount rate bias) on a panel taken from the National Longitudinal Survey of Youth (NLSY). Given household human capital and Armed Forces Qualification tes...