Difference between revisions of "The Impact of Entrepreneurship Hubs on Urban Venture Capital Investment"

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'''(7/27 Onwards)'''
 
'''(7/27 Onwards)'''
  
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Based on list of potential hubs, we will collect key variables for each hub. This will be included here:
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Collected variables for 30 hubs that are surely hubs. The results are here:
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*<code>E:\McNair\Projects\Hubs\Hubs Variables -Ariel.xls</code>
  
  

Revision as of 10:37, 4 August 2016


McNair Project
The Impact of Entrepreneurship Hubs on Urban Venture Capital Investment
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Hubs Pages

Abstract

The Hubs Research Project is a full-length academic paper analyzing the effectiveness of "hubs", a component of the entrepreneurship ecosystem, in the advancement and growth of entrepreneurial success in a metropolitan area.

This research will primarily be focused on large and mid-sized Metropolitan Statistical Areas (MSAs), as that is where the greater majority of Venture Capital funding is located.

A general overview of entrepreneurial ecosystems can be found here: Entrepreneurial Ecosystem.


Current Work

General Overview

Currently there are 3 major tasks being performed (list to be updated):

  1. Creation of VC data table: UPDATE: Complete (see completed work)
  2. Creation of Hubs Dataset: UPDATE: See current work in progress for updates We will collect key variables for potential Hubs.
  3. Hazard Rate Model: UPDATE: (7/11) Spoke to Xun Tang, econometrics professor in Rice's Economics Department, and now looking for appropriate proportional rate hazard models with time varying covariates. In order to perform our diff-diff model, we need to match MSAs. In order to do so, we will be using a hazard rate model to produce a probability that a MSA gets a Hub and compare MSAs that do and don't have hubs with similar probabilities.

Work In Progress

Hubs Data

(7/27 Onwards)

Collected variables for 30 hubs that are surely hubs. The results are here:

  • E:\McNair\Projects\Hubs\Hubs Variables -Ariel.xls


(Until 7/27)

See Hubs: Hubs Scorecard


(Week of 7/11)

1) We published the twitter count on mechanical turk and received results.

2) We have audited the results and updated the amazon.

3) We are creating additional potential turks on the amazon site (See Hubs: Hubs Scorecard)

4) We are finding more potential hubs from members of international national business innovation association


(Week of 7/4)

1) We have created the list and commented our thoughts after ---. For determining the variables, we have separated the list into two parts: a list of desired variables and ones that were previously collected, many of which are desired variables.

2) We have also created an example of how to write mechanical turks for collecting certain variables

Completed Work

Venture Capital Data General Overview

The main goal of the data set is to aggregate company, fund, and round level data to be analyzed at a combined MSA and year level. The data set is compromised of two major parts: a granular company/fund/round and an aggregated CMSA-Year. The data includes all United States Venture Capital transactions (moneytree) from the twenty-five year period of 1990 through 2015.

The Hubs data set, from SDC Platinum, has been constructed in the server: 

Data files are in 128.42.44.181/bulk/Hubs
All files are in 128.42.44.182/bulk/Projects/Hubs
psql Hubs2

See the server for the code and ~1st 5 rows of each table

Procedure - Granular Table

  1. Start with separate raw datasets for Companies, Funds, and Rounds
  2. Add Data to Each Individual dataset (e.g. add MSA code)
  3. Clean and standardize names (e.g. company or fund name) for each dataset
  4. Join the Datasets (here we need to exclude undisclosed companies)

Procedure - CMSA-Year Table

  1. Create a consistent CMSA-Year table to be used later
  2. Using the tables from the granular table, parse out the right data
  3. Join the parsed out data with the CMSA-Year Table
  4. Join these Tables

VC Specific Tables and Procedure

Raw data tables

  1. Funds: fund name, first investment date, last investment date, fund closing date, address, known investment, average investment, number of companies invested, MSA, MSA code.
  2. Rounds: round date, company name, state, round number, stage 1, stage 2, stage 3
  3. Combined Rounds: company name, round date, disclosed amount, investor
  4. Companies: company name, first investment, last investment, MSA, MSA code, address, state, date founded, known funding, industry
  5. MSA List: MSA, MSA code, CMSA, CMSA code
  6. Industry List: changes 6 industry categories to 4— ICT, Life Sciences, Semiconductors, Other


Granular Table (Fund-Round-Company)

The final table here contains all venture capital transactions by disclosed funds and portfolio companies, together with their CMSAs. To get the table, we processed the raw data sets in the following steps:

  1. Clean Company data
    1. Import raw data companies
    2. Add variable 'CMSA' from data set MSA list, update variable 'industry' by joining data set industry list
    3. Remove duplicates and remove undisclosed companies
  2. Clean Fund data
    1. Import raw data funds
    2. Add variable 'CMSA'
    3. Remove duplicates and remove undisclosed funds
    4. Match fund names with itself using [The Matcher (Tool) |The Matcher] to get the standard fund names
  3. Clean Round data
    1. Import raw data rounds and combined rounds
    2. Add variables 'number of investment', 'estimated investment' and 'year'
    3. Remove duplicates and remove undisclosed funds
  4. Combine Companies and Rounds
    1. Combine cleaned companies and rounds data table on company names
    2. Add variable 'round number' and 'stage'
    3. Remove duplicates
  5. Combine Funds and rounds-companies
    1. Match fund names in rounds data table with standard fund names using [The Matcher (Tool) |The Matcher] to standardize fund names in rounds data table
    2. Join standard fund names to rounds-companies table
    3. Join cleaned funds table to rounds-companies table on standard fund names


CMSA-Year Aggregated Table

The final table contains number of companies and amount of investment, categorized by distance and stages, of each CMSA.

We processed data as follows:

  1. Create the CMSA-Year Table
    1. Create single variable tables: Distinct CMSA, year, stage, found year of fund and found year of company.
    2. Create the cross production tables: CMSA-year, CMSA-year-fund year founded and CMSA-year-company year founded
  2. Draw data from cleaned companies, funds and rounds tables
    1. Create a table with 'CMSA', 'number of companies' and 'year Founded' from cleaned companies table and join it to CMSA -year founded
    2. Create a table with 'Company CMSA', 'round year', 'disclosed amount' from rounds-companies combined table, and add stage binary variables. Join it to CMSA-year-company year founded
    3. Create a table with 'CMSA', 'fund year', 'number of investors' from cleaned funds table and join it to CMSA-year-fund year founded
  3. Create near-far and stages table
    1. Add fund data to rounds-companies
    2. Create near-far and stages binary variable
    3. Count investment and deals by CMSA and year, categorized by near-far and stages
  4. Combine all tables by CMSA and round-year

Supplementary Data Sets

Supplementary data sets are cleaned and joined back to CMSAyear table on CMSA and year:

  1. Number of STEM graduate student, by university and year(2005 to 2014).
  2. University R&D spending, by university and year(2004 to 2014).
  3. Income per capital, by MSA and year(2000 to 2012)
  4. Wages and salaries, by MSA and year(2000 to 2012)


The datasets can respectively be found at: 

E:\McNair\Projects\Hubs\STEM grads for upload v2.xls
E:\McNair\Projects\Hubs\NSF spending for upload.xls
E:\McNair\Projects\Hubs\Income per capita upload.xls
E:\McNair\Projects\Hubs\Wage for upload v2.xls

Resources

Additional Resources



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