<?xml version='1.0' encoding='UTF-8'?><codeBook xmlns="ddi:codebook:2_5" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="ddi:codebook:2_5 https://ddialliance.org/Specification/DDI-Codebook/2.5/XMLSchema/codebook.xsd" version="2.5"><docDscr><citation><titlStmt><titl>HarvardX Person-Course Academic Year 2013 De-Identified dataset, version 3.0</titl><IDNo agency="DOI">doi:10.7910/DVN/26147</IDNo></titlStmt><distStmt><distrbtr source="archive">Harvard Dataverse</distrbtr><distDate>2014-05-27</distDate></distStmt><verStmt source="archive"><version date="2019-12-18" type="RELEASED">11</version></verStmt><biblCit>HarvardX, 2014, "HarvardX Person-Course Academic Year 2013 De-Identified dataset, version 3.0", https://doi.org/10.7910/DVN/26147, Harvard Dataverse, V11, UNF:6:WSoYmsP5KeX2t/6g2JiEuw== [fileUNF]</biblCit></citation></docDscr><stdyDscr><citation><titlStmt><titl>HarvardX Person-Course Academic Year 2013 De-Identified dataset, version 3.0</titl><IDNo agency="DOI">doi:10.7910/DVN/26147</IDNo></titlStmt><rspStmt><AuthEnty affiliation="HarvardX">HarvardX</AuthEnty></rspStmt><prodStmt><prodDate>2019-11-12</prodDate></prodStmt><distStmt><distrbtr source="archive">Harvard Dataverse</distrbtr><distrbtr URI="http://thedata.harvard.edu/dvn/">Harvard Dataverse Network</distrbtr><contact affiliation="MIT" email="irx@mit.edu">Jon Daries</contact><depDate>2019-12-18</depDate><distDate>2019-12-18</distDate></distStmt><holdings URI="https://doi.org/10.7910/DVN/26147"/></citation><stdyInfo><subject><keyword xml:lang="en">Social Sciences</keyword><keyword>HarvardX</keyword></subject><abstract date="2019-11-12">This release is comprised of de-identified data from the first year (Academic Year 2013: Fall 2012, Spring 2013, and Summer 2013) of HarvardX courses on the edX platform along with related documentation. These data are aggregate records, and each record represents one individual's activity in one edX course. For more information about the existing analyses of these data and the first year of HarvardX  courses, please see the HarvardX and MITx working paper "HarvardX and MITx: The first year of open online courses" by Andrew Ho, Justin Reich, Sergiy Nesterko, Daniel Seaton, Tommy Mullaney, Jim Waldo, and Isaac Chuang (http://papers.ssrn.com/sol3/papers.cfm?abstract_id=2381263).  The first release of this dataset is the HarvardX Person-Course Academic Year 2013 De-Identified dataset, version 3.0, created on November 12, 2019.   File name: HXPC13_DI_v3_11-13-2019.csv   The md5sum for this release (HXPC13_DI_v3_11-13-2019.csv) is: 53419b486c3b19c14d2f06612980f630</abstract><sumDscr/></stdyInfo><method><dataColl><sources/></dataColl><anlyInfo/></method><dataAccs><setAvail/><useStmt/><notes type="DVN:TOU" level="dv">Users of the dataset agree to abide by the Dataverse Community Norms, specifically:&#xd;
&#xd;
Maintaining anonymity of human subjects&#xd;
Users of the Service should not abuse the available data that relate to human subjects and use the materials to:&#xd;
&#xd;
-obtain information that could directly or indirectly identify any research subjects, or obtain information to attempt to directly or indirectly identify any research subjects;&#xd;
-produce and/or publish connections among datasets that could identify individuals or organizations; or&#xd;
-obtain (additional) information about or (additional) means of contact for already-identified subjects.</notes><notes type="DVN:TOA" level="dv">Reminder that the terms of use include the Dataverse community norms, specifically:&#xd;
&#xd;
Maintaining anonymity of human subjects&#xd;
Users of the Service should not abuse the available data that relate to human subjects and use the materials to:&#xd;
&#xd;
-obtain information that could directly or indirectly identify any research subjects, or obtain information to attempt to directly or indirectly identify any research subjects;&#xd;
-produce and/or publish connections among datasets that could identify individuals or organizations; or&#xd;
-obtain (additional) information about or (additional) means of contact for already-identified subjects.</notes></dataAccs><othrStdyMat/></stdyDscr><fileDscr ID="f3624095" URI="https://dataverse.harvard.edu/api/access/datafile/3624095"><fileTxt><fileName>HXPC13_DI_v3_11-13-2019.tab</fileName><dimensns><caseQnty>338223</caseQnty><varQnty>20</varQnty></dimensns><fileType>text/tab-separated-values</fileType></fileTxt><notes level="file" type="VDC:UNF" subject="Universal Numeric Fingerprint">UNF:6:WSoYmsP5KeX2t/6g2JiEuw==</notes><notes level="file" type="DATAVERSE:FILEDESC" subject="DataFile Description">HarvardX Person-Course Academic Year 2013 De-identified Dataset, Version 2.0</notes></fileDscr><dataDscr><var ID="v20820602" name="course_id" intrvl="discrete"><location fileid="f3624095"/><labl level="variable">course_id</labl><varFormat type="character"/><notes subject="Universal Numeric Fingerprint" level="variable" type="Dataverse:UNF">UNF:6:5nIllYPWiMOKY55zRzdn8Q==</notes></var><var 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