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CommunityData:Wikia rises and declines
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== Measures == The study will have 5 models. The first model is for hypothesis 1. The last 4 models are for hypothesis 2. # [mod.discrete] Discrete time survival model of newcomers. # Contribution rejection # Rule accrual # Automated tool accrual # Interaction with newcomers Data will be the 2010 Wikia dumps. Inclusion criteria will be broad. ''' Update: It looks like norms on wikia about BRD are generally not the same as en WP. Messages and talk page use are kinda rare. We will also analyze data from all sufficiently large (non-english) Wikipedias. The unit of analysis for model 1 is the newcomer. We will model random intercept variance terms for Wikis because partial pooling is more realistic than complete pooling and afford inclusion of the many small Wikis with activity levels and scales. Also Nate is comfortable working with lme4. (Halfaker et al. 2013) use fixed effects for year, which is fine, but we should also take a look at models with fixed effects for month as well. For models 2-5 the unit of analysis will be the wiki. This model will have only two levels: Wiki and time. Again we will fit models with fixed effects for month and year. For both models we will use heteroskedasticity robust standard errors. For models 2-5 we will include autoregression terms (equivalent to adding lagged outcome variables to the RHS) for the depdendent variable (AR(1) or AR(2)). === Newcomer retention === Following Halfaker et al. (2013), a new contributor is a logged-in editor in their first edit-session. The dependent variable for model [mod.discrete] indicates whether a new contributor makes a subsequent edit within the next 2 months. While Halfaker et al. (2013) sampled a set of desirable newcomers to distinguish them from spammers and vandals. Doing this for a large number of Wikis would be very labor intensive. Halfaker et al. (2013) results for their set of desirable newcomers point in the same direction as their results for all newcomers. We will analyze all newcomers without attempting to distinguish the desirable from the undesirable. ==== Newcomer controls ==== Again following Halfaker et al. (2013) we will include controls for the number of edits that a newcomer makes in their first session. We will also include a count variable for the number of edits that newcomer has made on Wikia (or all language Wikipedias) overall and an indicator for whether the newcomer has edited any other Wikia wikis. === Rejected newcomer contributions === After identifying newcomers, we can easily identify contributions they have made which have been rejected. These are (a.) edits which are reverted. Halfacker et al also use new articles which are deleted as a measure of rejection, but this is not possible for us without direct access to the database. === Discussion following rejection === After identifying rejected edits we can identify whether there is follow-up discussion according. Following Halfaker et al. (2013) we will measure reciprocity in discussion, which is when the reverting editor posts to the talk page after the newcomer. It is likely that the bold-revert-discuss (BRD) is not a strong norm on Wikia as it is on Wikipedia. Therefore we will also include indications of other forms of interaction between reverting editor and reverted newcomer (user talk page, talk page no matter who posts first, message wall).
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