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321.
《Scandinavian Journal of Statistics》2018,45(3):534-556
Bayesian hierarchical formulations are utilized by the U.S. Bureau of Labor Statistics (BLS) with respondent‐level data for missing item imputation because these formulations are readily parameterized to capture correlation structures. BLS collects survey data under informative sampling designs that assign probabilities of inclusion to be correlated with the response on which sampling‐weighted pseudo posterior distributions are estimated for asymptotically unbiased inference about population model parameters. Computation is expensive and does not support BLS production schedules. We propose a new method to scale the computation that divides the data into smaller subsets, estimates a sampling‐weighted pseudo posterior distribution, in parallel, for every subset and combines the pseudo posterior parameter samples from all the subsets through their mean in the Wasserstein space of order 2. We construct conditions on a class of sampling designs where posterior consistency of the proposed method is achieved. We demonstrate on both synthetic data and in application to the Current Employment Statistics survey that our method produces results of similar accuracy as the usual approach while offering substantially faster computation. 相似文献
322.
David R. Bickel 《Statistics》2018,52(3):552-570
Learning from model diagnostics that a prior distribution must be replaced by one that conflicts less with the data raises the question of which prior should instead be used for inference and decision. The same problem arises when a decision maker learns that one or more reliable experts express unexpected beliefs. In both cases, coherence of the solution would be guaranteed by applying Bayes's theorem to a distribution of prior distributions that effectively assigns the initial prior distribution a probability arbitrarily close to 1. The new distribution for inference would then be the distribution of priors conditional on the insight that the prior distribution lies in a closed convex set that does not contain the initial prior. A readily available distribution of priors needed for such conditioning is the law of the empirical distribution of sufficiently large number of independent parameter values drawn from the initial prior. According to the Gibbs conditioning principle from the theory of large deviations, the resulting new prior distribution minimizes the entropy relative to the initial prior. While minimizing relative entropy accommodates the necessity of going beyond the initial prior without departing from it any more than the insight demands, the large-deviation derivation also ensures the advantages of Bayesian coherence. This approach is generalized to uncertain insights by allowing the closed convex set of priors to be random. 相似文献
323.
Gauri S. Datta & Thomas J. DiCiccio 《Journal of the Royal Statistical Society. Series B, Statistical methodology》2001,63(4):691-703
We consider a general multiparameter set-up, where both the interest and the nuisance parameters are possibly vector valued. We derive an explicit higher order asymptotic formula to compare the expected volumes of confidence sets given by likelihood ratio statistics arising from the usual profile likelihood and various adjustments thereof. Our general framework also allows us to include highest posterior density regions, with approximate frequentist validity, in the study. The fact that our interest parameter is possibly vector valued complicates the derivation and warrants the development of special tools and techniques. 相似文献
324.
Monetary incentives remain an integral component of economics experiments. However, the experimental economics literature is inconclusive when it comes to the effectiveness of random payment mechanisms, specifically in non-strategic individual decision experiments. To contribute to the literature on incentives in experiments, this study performed a meta-analysis of 94 dictator game studies and examined the effect of two frequently used random payment mechanisms on behavior. The mechanisms analyzed were the random problem selection procedure (RPSP) and between-subject random incentivized system (BRIS). The meta-analysis showed that RPSP and BRIS did not significantly alter behavior when compared to a single incentivized decision and incentivizing all subjects, respectively. The results support the effectiveness of RPSP and BRIS in nonstrategic individual decision experiments. 相似文献