Publication Bias and Editorial Statement on Negative Findings
研究了2015年八家健康经济学期刊的编辑声明是否减少了发表偏倚，发现声明使拒绝零假设的检验比例下降了18个百分点，表明激励措施可促进研究透明度。
Abstract In February 2015, the editors of eight health economics journals sent out an editorial statement which aimed to reduce the extent of specification searching and reminds referees to accept studies that: ‘have potential scientific and publication merit regardless of whether such studies’ empirical findings do or do not reject null hypotheses’. Guided by a pre-analysis, we test whether the editorial statement decreased the extent of publication bias. Our differences-in-differences estimates suggest that the statement decreased the proportion of tests rejecting the null hypothesis by 18 percentage points. Our findings suggest that incentives may be aligned to promote more transparent research.