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[[Category:Work Log]]06/11/2018 - Worked with Wei to get him set up with system[[Category:Internal]]===Fall 2017===<onlyinclude>
07</15/2016 - Refining hazard model: revising variables used, comparing Cox Proportional Hazard and Lognormal Accelerated Failure Time modelsonlyinclude>
07/18/2016 - Cataloged SQL tables, revised STATA script (STATAdatasetup2.do) to include ratios, replace cashflow with ebitda, and filter out firms smaller than $50 million===Spring 2017===
0702/1902/2016 2017 - Investigated baseline hazard of Cox Proportional Hazard model. Compared to Lognormal and Loglogistic Accelerated Failure Time models to try to predict hazard rate Planned immediate next steps for LBO project; fixed bug in matching code (matchpair indices not just hazard ratiobeing stored correctly)
07/20/===Fall 2016 - Adjusted dataset to filter out firms that are small (<$40m) or not listed in major exchanges (AMEX, NYSE, NASDAQ). Consulted Brian on descriptive statistics of dataset. 07/21/2016 - Investigated negative ebitda ratios. 07/22/2016 - Performed further testing of hazard model. Ran preliminary matching analysis using patent flow data. 07/25/2016 - Cleaned data setup do file. Organized list of data problems to consult with Ed.===
no edit summary
==Summer 2018==
[[James Chen]] [[Work Logs]] [[James Chen (Work Log)|(log page)]]
09/06/2016 - Discussed workload for the week, plan for project going forward with Ed and Jake.
10/13/2016 - Met with Ed and Brian to discuss results and future work for LBO Innovation project. Began rebuild/redocumentation of dataset.
10/14/2016 - Continuing rebuild, documentation at [[Leverage_Buyout_Innovation_Leveraged_Buyout_Innovation_(CleanAcademic_Paper)#New_Version]]. COMPUSTAT data is now standardized for linking.
10/18/2016 - Began importing Brian's SDC data into SQL database
10/28/2016 - Completed initial SDC join. Adding additional matches using name-based matching.
11/0403/2016 - Continued working on name-based matching. 11/04/2016 - Completed name-based matching for SDC data/LBOs. 11/10/2016 - Finalized documentation for LBO side of project. Minor bugfixes for name-based matching from last week. 11/11/2016 - Worked on matching in patent flows and stocks, basically finished up to name-based matching 11/17/2016 - Finished matching in patent flows and stocks, contingent on having a completed active patent start/end table from Napas
11/0518/2016 - Completed nameMinor bugfixes for STATA code (got winsorized variables working consistently); began working on patent start/end table ===Summer 2016=== 07/15/2016 - Refining hazard model: revising variables used, comparing Cox Proportional Hazard and Lognormal Accelerated Failure Time models 07/18/2016 - Cataloged SQL tables, revised STATA script (STATAdatasetup2.do) to include ratios, replace cashflow with ebitda, and filter out firms smaller than $50 million 07/19/2016 - Investigated baseline hazard of Cox Proportional Hazard model. Compared to Lognormal and Loglogistic Accelerated Failure Time models to try to predict hazard rate (not just hazard ratio) 07/20/2016 - Adjusted dataset to filter out firms that are small (<$40m) or not listed in major exchanges (AMEX, NYSE, NASDAQ). Consulted Brian on descriptive statistics of dataset. 07/21/2016 - Investigated negative ebitda ratios. 07/22/2016 -based Performed further testing of hazard model. Ran preliminary matching for SDC analysis using patent flow data. 07/25/LBOs2016 - Cleaned data setup do file. Organized list of data problems to consult with Ed. [[Category:Work Log]]
