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  "path": "/t/a-b-testing-for-information-gain/28690#post_2",
  "publishedAt": "2026-04-02T20:55:30.000Z",
  "site": "https://discourse.datamethods.org",
  "tags": [
    "http://dx.doi.org/10.1198/tast.2009.08196"
  ],
  "textContent": "If the response variable is semi-continuous and has somewhat of a normal distribution you could fit a unstructured covariance matrix and try to fit several correlation structures to it, then use the fitted structure to estimate efficiencies of certain contrasts. This paper may help: http://dx.doi.org/10.1198/tast.2009.08196",
  "title": "A/B Testing for Information Gain"
}