Who We Are

Our DEG team as of August 2018 (L to R): Matt, Diane, Mike, and Aditi

DEG on LinkedIn

Michael Udell is the founder and Managing Member of District Economics Group, LLC. The company, which was started in 2013, focuses on helping clients navigate the data and economics issues of Congressional legislative proposals. Mike’s career in federal tax policy began in 1985 at the IRS estimating the tax gap using the Taxpayer Compliance Measurement Program data and continued from 1991 through 2008 at the Congressional Joint Committee on Taxation (JCT) providing revenue estimates of federal tax legislation. While at the JCT where he developed several estimating models for excise taxes, the estate and gift taxes, and individual income taxes. During that time he also was responsible for revenue estimates for tax compliance proposals, including the IRS Restructuring and Reform Act of 1998 and economic substance legislation. At JCT, he worked closely with the Congressional Budget Office to coordinate the Joint Committee’s micro-simulation model for individual income taxes with the CBO’s model of health care expenditures to account for illegal immigrants in preparation for the consideration of Congressional legislation. From 2009 through 2012 Mike was a senior manager at Ernst & Young LLP where he launched the firm’s practice in the medical device excise tax.

Mike earned a B.A. from the University of Pennsylvania and a PhD from Caltech. When Mike is not thinking about tax policy, he enjoys sailing in Annapolis, where he lives.

Diane Lim is Principal at District Economics Group, where she specializes in bringing together a variety of public and private sources of data to analyze and provide unique insights on economic trends and the various economic effects of tax, budget, and regulatory policies. She has spent her 30-plus year career in a variety of prominent roles in the federal government, nonprofit and academic sectors. She began her post-Ph.D. career as an assistant professor at Penn State University before coming to DC to work as a visiting scholar at the Congressional Budget Office—but then she never went back and has worked in DC on (mostly) federal public policy issues ever since. She served as chief economist for the House Ways and Means Committee, House Budget Committee, the Concord Coalition, and the Pew Charitable Trusts. She was a senior economist on the staff of the President’s Council of Economic Advisers during the final year of the Clinton Administration and first 100 days of the George W. Bush Administration. She has also worked for the Brookings Institution and the Urban Institute. Immediately before joining DEG in August 2018, she was principal economist at The Conference Board, a non-profit business membership and research organization.

In addition to her day job for District Economics Group, she teaches courses in behavioral economics and tax policy as an adjunct professor at George Washington University and Georgetown University, and she is a part-time yoga teacher.  She is a founding advisory board member of the Frank Batten School of Leadership and Public Policy at the University of Virginia, and she is a past president of the National Tax Association.

Diane received her Ph.D. in economics from the University of Virginia, her master’s degree from Brown University, and her bachelor’s degree from the University of Michigan. She is the proud mom of four, now-adult children—which is why her past blog was called EconomistMom, a label which she still goes by on Twitter.

Aditi Vashist is Founding Principal at District Economics Group where her focus is to perform, evaluate and communicate economic and statistical analyses for tax policy purposes, such as the estimation of the fiscal impact of proposed legislation for a variety of industry leaders and trade associations. She manages project deliverables and client communication, leads and conducts estimates, and presents findings on a wide array of issues relating to domestic and international individual and business tax topics. These include revenue generating provisions from the Affordable Care Act such as the Health Insurance Premiums Fee, the Medical Device Excise Tax, and the ‘Cadillac tax’ on high-cost plans; various provisions from the House Ways and Means and Senate Finance Committee proposals for corporate and international tax reform including the taxation of financial products, tax treatment of foreign-source income and the alternative minimum tax; education expenses; private activity bonds for public-private partnerships; estate and gift taxes; and a proposed formulary apportionment of global profits for federal corporate taxation.

Prior to her work at DEG, she was a Senior Analyst with the Quantitative Economics and Statistics Group (QUEST) at Ernst & Young LLP, a group that specializes in tax policy, statistical sampling and surveys. While at EY, Aditi developed revenue estimates presented to the Joint Committee on Taxation. She built tax simulation models and performed research and analysis of tax policy topics such as patent boxes, excise taxes, deferred tax assets/ liabilities using tax, regulatory and census data, and worked on economic impact studies estimating the effects of items such as business property taxes across the United States. Aditi also performed the development, execution, analysis and presentation of a variety of surveys relating to topics such as risk analysis and tax credits, as well as meals and entertainment and R&D statistical sampling studies for business tax compliance.

Aditi received an M.S. in Mathematics from the University of Michigan Ann Arbor, and an M.S. in Applied Economics from the Johns Hopkins University. She completed her undergraduate career with highest honors at Bryn Mawr College in Pennsylvania, with an A.B.-M.A. dual degree in Mathematics, Physics and Theater.

Matthew Fellows is a Senior Analyst at District Economics Group where he assists with the formulation and application of models of federal tax liabilities and tax receipts. Matt also develops business methods and procedures to efficiently update models for revised data and for changes in tax law.

Prior to working at DEG, Matt was a research assistant in the Real Estate Finance section at the Federal Reserve in Washington DC. As a research assistant, Matt contributed analysis and presentation slides for financial briefings to Federal Reserve board members, assisted with his section’s forecast of house prices, and monitored and analyzed key indicators to ensure that the housing market was stable. He also used SAS and R to create new residential real estate indicators by analyzing databases with millions of observations, and he developed automated processes to update and then visually display these indicators.

Matt received a B.S. in mathematics and economics from Trinity College in 2015 where he played on the club soccer team. Matt still enjoys playing soccer on the weekends in Washington, DC.