Digg_2009 social news votes and graph

Digg2009 data set contains data about stories promoted to Digg's front page over a period of a month in 2009. For each story, we collected the list of all Digg users who have voted for the story up to the time of data collection, and the time stamp of each vote. We also retrieved the voters' friendship links. The semantics of the friendship links are as follows <br>user_id --&gt; friend_id <br><br>means that user_id is watching the activities of (is a fan of) friend_id. User ids have been anonymized, but are unique in the data set: a user with a specific id in the friendship links table and a user with the same id in the votes table correspond to the same actual user.The data is in zipped csv files that are password protected. The password is <i>digg2009_user</i>.VotesTable <b>digg_votes</b> contains 3,018,197 votes on 3553 popular stories made by 139,409 distinct users. The first vote is from the story's submitter. <br>Schema of the tablevote_date: Unix time stamp of the votevoter_id: anonymized unique id of the voterstory_id: anonymized unique id of the storyFriendship linksTable <b>digg_friends</b> contains 1,731,658 friendship links of 71,367 distinct users. Voters who do not appear in the table did not specify any friends at the time data was collected.<br>Schema of the digg_friends tablemutual: indicated whether the link represents a mutual friend relation (1) or not (0)friend_date: Unix time stamp of when the friendship link was createduser_id: anonymized unique id of a userfriend_id: anonymized unique id of a userThis data is made available to the community for research purposes only. If you use the data in a publication, please cite: <br>Hogg, T. and Lerman, K. (2012) Social Dynamics of Digg. <i>EPJ Data Science</i>1(5). doi:10.1140/epjds5