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1.
BIAS IN LIST-ASSISTED TELEPHONE SAMPLES 总被引:4,自引:1,他引:3
BRICK J. MICHAEL; WAKSBERG JOSEPH; KULP DALE; STARER AMY 《Public opinion quarterly》1995,59(2):218-235
A number of researchers have suggested list-assisted samplingfor the selection of telephone households to overcome some ofthe operational difficulties associated with the Mitofsky-Waksbergmethods of random digit dialing (RDD). An advantage of a list-assistedmethod of RDD is that an equal probability systematic sampleof telephone numbers can be selected and the variances of estimatesfrom such a sample are usually lower than from a clustered designlike the Mitofsky-Waksberg method. The main disadvantage ofthe list-assisted method is that it excludes some householdsfrom the sample, thus creating a coverage bias in the estimates.This article describes research on the coverage bias for a particularmethod of list-assisted sampling. The two key determinants ofcoverage bias are the proportion of households that are noteligible for the sample and the differences in the characteristicsof the covered and not covered populations. The results showthat about 4 percent of all households are excluded in nationalsamples using this method of sampling. Furthermore, they showthat the differences between the covered and uncovered populationsare generally not large. The coverage bias resulting from theseconditions may often be small. 相似文献
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RESPONSE-TIME MEASUREMENT IN SURVEY RESEARCH A METHOD FOR CATI AND A NEW LOOK AT NONATTITUDES 总被引:1,自引:0,他引:1
The paper introduces a methodology for measuring accuratelythe time it takes respondents to answer questions in computer-assistedtelephone surveys. The methodology, which is completely invisibleto respondents, comprises a computer "clock," capable of timingresponses with millisecond accuracy, and a "voice-key" thatconverts sounds emitted by respondents into signals capableof triggering the computer clock. Response times to questionson a range of attitude questions, including stable and unstableattitudes, were measured. The results revealed orderly normsin the latencies associated with various types of survey questions.The latencies associated with the expression of stable and unstableattitudes are discussed in the context of the notion of "nonattitudes"and shed new light on this controversial thesis. Overall, ourresults demonstrate that response latencies can be measuredprecisely and reliably in telephone surveys and that the datafrom such measurement open new windows on the cognitive dynamicsof survey responses. 相似文献
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Procurement lead time estimates are critical factors in production planning; however, they are generally based on a buyer's experience. The Westinghouse Corporation developed a linear model which successfully predicted procurement lead times for hot and cold rolled steel. This paper discusses nine models which use utilization and inventory data to predict lead time planning factors for aluminum, magnesium, steel and titanium products. The Lockheed-Georgia Company, which produces aerospace products, provided data for this research. The functional form of the models is significant and suggests that a nonlinear transformation of utilization based upon simple queueing models is a significant predictor of lead time duration. 相似文献
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JOHN JOSEPH WALLIS 《Economic inquiry》1991,29(3):510-524
While the introduction of federal matching grants to finance the New Deal relief programs is usually viewed as a mechanism to insure federal control over state relief spending, a careful study of the New Deal reveals that the reverse was the case: matching grants allowed the states to escape close federal control. The standard economic model of inter-governmental grants reveals that the federal government will, if allowed, prefer to use discretionary rather than matching grants. With discretion, however, came power; power that neither the states nor Congress wished to see concentrated in the Executive branch. 相似文献
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