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CommunityData:Wikia rises and declines
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=== Measures === Our measures of “discussion following rejection” as an indication of the degree of impersonality in governance follows the prior work we aim to replicate. These measures are virtuous in their simplicity and clarity, but reduce complex interpersonal communication to counts of categories of interaction. This is a potential source of bias, noise, and a threat to construct and ecological validity. We do not attempt to identify desirable vs undesirable newcomers. Halfaker et al. (2013) did not find substantive differences between the two groups. However if we fail to fully replicate their findings, this could be a reason. Using first difference to measure rates of change is pretty freaking noisy! We hope to capture average trends, but it’s possible for oscillations and lags and other fun time series problems to impart bias. Using a smoothed average helps address such threats in exchange for new ones. We should fit multiple models with different specifications to make sure our results are robust to this decision. Using namespace 4 as a proxy for rules is also noisy and possibly biased. Some wikis use namespace 4 for activities other than norm setting and rule making. We have not found a good systematic way to separate these activities from rules.
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