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Remarks and examples
Remarks are presented under the following headings:
What is Bayesian analysis?
Bayesian versus frequentist analysis, or why Bayesian analysis?
How to do Bayesian analysis
Advantages and disadvantages of Bayesian analysis
Brief background and literature review
Bayesian statistics
Posterior distribution
Selecting priors
Point and interval estimation
Comparing Bayesian models
Posterior prediction
Bayesian computation
Markov chain Monte Carlo methods
Metropolis–Hastings algorithm
Adaptive random-walk Metropolis–Hastings
Blocking of parameters
Metropolis–Hastings with Gibbs updates
Convergence diagnostics of MCMC
Summary
The first five sections provide a general introduction to Bayesian analysis. The remaining sections
provide a more technical discussion of the concepts of Bayesian analysis.
主讲嘉宾
王存同,人口学博士、教授。博士毕业于北京大学(与University of Michigan合作培养),博士后研究员就职于美国伊利诺伊大学(University of Illinois at Urbana-Champaign)。现为财经大学社会发展学院教授,主要从事社会统计及计量经济分析、人口社会学、人口经济学等领域的研究与教学,其定量研究与教学在国内外学术界享有较高的盛誉。
Stata 16 has a new suite of commands for performing meta-analysis. This suite lets you explore and combine the results from different studies. For instance, if you have collected results from 20 studies about the effect of a particular drug on blood pressure, you can summarize these studies and estimate the overall effect using meta-analysis.
The new meta suite is broad, but what sets it apart is its simplicity.
You can type, for instance,
. meta set effectsize stderr
to declare precomputed effect sizes or use meta esize to compute effects from summary data. With this, you can perform random-effects, fixed-effects, or common-effect meta-analysis.
To estimate an overall effect size and its confidence interval, obtain heterogeneity statistics, and more, you simply type
. meta summarize
And visualizing the results is as easy as typing
. meta forestplot
But the meta suite provides much more.
Meta-regression and subgroup analysis allow you to evaluate the heterogeneity of studies. These are available via meta regress and meta forestplot, subgroup() or meta summarize, subgroup().
You can investigate potential publication bias. Check visually for funnel-plot asymmetry using meta funnelplot; formally test for funnel-plot asymmetry using meta bias; and assess publication bias using the trim-and-fill method with meta trimfill.
You can even perform cumulative meta-analysis with meta summarize, cumulative().
All the meta-analysis features are documented in the new Meta-analysis Reference Manual.
summarize displays the mean and standard deviation of a variable across observations; program
writers can access the mean in r(mean) and the standard deviation in r(sd) (see [R] summarize).
egen’s rowmean() function creates the means of observations across variables. rowmedian() creates
the medians of observations across variables. rowpctile() returns the #th percentile of the variables
specified in varlist. rowsd() creates the standard deviations of observations across variables.
rownonmiss() creates a count of the number of nonmissing observations, the denominator of the
rowmean() calculation
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