Progress 09/01/06 to 08/31/09
Outputs OUTPUTS: I presented the results from this research at the BREAD conference, Purdue's Agricultural Economics department seminar, and UW Madison Agricultural Economics department seminar. In addition, we created a website called www.checkyourdata.com at which anyone can check their data quality using the statistical techniques we developed. PARTICIPANTS: Laura Schechter, PI, led the research on this topic. John Morrow, Research Assistant, conducted data analysis and created the website www.checkyourdata.com Alex Yuskavage, Research Assistant, conducted data analysis and statistical development of the tests used. George Judge, collaborator. Marian Grendar, collaborator. TARGET AUDIENCES: The creation of the website www.checkyourdata.com was the main effort made to reach out to the target audience. The target audience is anybody who collects or uses survey data. The website is available to anyone who would like to test the quality of his or her data. PROJECT MODIFICATIONS: Not relevant to this project.
Impacts The main outcome of this research was that we developed new statistical techniques for measuring data quality. These techniques can be carried out while collecting data to improve data quality.
Publications
- "Detecting Problems in Survey Data using Benford's Law," G. Judge and L. Schechter, 2009. Journal of Human Resources, 44(1): 1-24.
- "An Empirical Non-Parametric Likelihood Family of Data-Based Benford-Like Distributions," M. Grendar, G. Judge and L. Schechter, 2007. Physica A: Statistical Mechanics and its Applications, 380: 429-438.
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Progress 01/01/08 to 12/31/08
Outputs OUTPUTS: I have presented this research in multiple seminars. This includes Purdue's Ag Econ department, University of Wisconsin's Ag Econ department, and the BREAD conference at Yale university. We have also created a website: www.checkyourdata.com at which individuals can plug in their own data sets and test their accord with Benford's law. PARTICIPANTS: Not relevant to this project. TARGET AUDIENCES: The target audience for this project is any researcher who uses survey data in their analysis. The effort made to cause a change in actions is the creation of the website, www.checkyourdata.com, making these data quality tests easily available to the general population of researchers (or anyone else). PROJECT MODIFICATIONS: Nothing significant to report during this reporting period.
Impacts There are not yet any outcomes/impacts.
Publications
- "Detecting Problems in Survey Data using Benford's Law," (2009) with G. Judge, Forthcoming. Journal of Human Resources.
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Progress 01/01/07 to 12/31/07
Outputs OUTPUTS: This research was disseminated by being presented at an internal seminar in the Agricultural and Applied Economics department at UW Madison, as well as at the Ninth BREAD Conference on Development Economics at Yale University. In addition, a website has been created (www.checkyourdata.com) which allows users to upload their data and measure data quality.
TARGET AUDIENCES: The target audience for this project is any researcher who uses survey data in their analysis. The effort made to cause a change in actions is the creation of the website, www.checkyourdata.com, making these data quality tests easily available to the general population of researchers (or anyone else).
Impacts There are not yet any outcomes/impacts.
Publications
- "An Empirical Non-Parametric Likelihood Family of Data-Based Benford-Like Distributions," (with M. Grendar and G. Judge) 2007. Physica A: Statistical Mechanics and its Applications, 380: 429 - 438.
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Progress 09/01/06 to 12/31/06
Outputs We are in the process of looking at seven different agricultural household survey data sets world-wide. We are comparing the quality of data on crop and animal production. We have been finding that small data sets collected by academics tend to be of better quality than larger data sets collected by government institutes. The data is also of worse quality for more diversified farmers. There doesn't seem to be large quality differentials between results when both the husband and the wife report.
Impacts The expected impact is to give practitioners an easy-to-use tool with which they can judge the quality of data sets, enumerators, and specific survey questions.
Publications
- No publications reported this period
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