The data consist of \(k=40\) randomized trials between 1980 and 1989 of a surgical treatment for stomach ulcers. Each of the trials has an estimated log-odds ratio that measures the rate of occurrence of recurrent bleeding given the surgical treatment.
data("ulcer")
A data frame of \((y_i,\) se\(_i)\) for \(i = 1,...,40\).
y
log-odds of the occurrence of recurrent bleeding in the \(i^{th}\) study
se
standard error of the log-odds for the \(i^{th}\) study
Efron, B., 1996. "Empirical Bayes methods for combining likelihoods," Journal of the American Statistical Association, 91(434), pp. 538-550.