//-->
Worker perceptions of job insecurity in the mid-1990s : evidence from the survey of economic expectations
Manski, Charles F., (2000)
Experimental pricing as an approach to demand analysis
Powell, L. A., (1958)
Monetäre Umweltbewertung mit der Contingent-Valuation-Methode
Wagner, Ralf, (2000)
Commercial uses of sampling
Stock, J. Stevens, (1947)
Reliability of response in a sociomedical population study
Hochstim, Joseph R., (1971)