ADP National Employment Report Shows United States Added 78,000 Private Sector Jobs in September

ADP Report Provides Valuable Data About U.S. Employment Situation

ROSELAND, New Jersey -- October 4, 2006 -- Private sector employment increased by 78,000 in September, according to today’s ADP National Employment Report(SM). The ADP National Employment Report, created by ADP® Employer Services, a division of Automatic Data Processing, Inc. (ADP) (NYSE: ADP), in partnership with Macroeconomic Advisers, LLC, is based on actual payroll data and measures the change in total nonfarm private employment each month.

“Leveraging the scale and breadth of ADP’s client base, the ADP National Employment Report presents a credible alternative estimate of employment,” said Gary Butler, President and Chief Executive Officer of ADP. “The vast and growing number of ADP clients across virtually all markets and industries enables us to provide an increasingly valuable perspective on the nation’s employment picture.”

“Total nonfarm private employment grew 78,000 from August to September on a seasonally adjusted basis, according to the ADP National Employment Report,” said Joel Prakken, Chairman of Macroeconomic Advisers, LLC. “These findings indicate continued sluggish gains in private sector employment which, according to the ADP National Employment Report, have averaged just 95,000 over the past three months.”

Interpreting the Report

Providing real-time information about employment in the United States, the ADP National Employment Report is an additional assessment of American business and economic conditions. Findings are represented as both a monthly employment level number and a change in monthly employment level number. Employment level represents the total number of private sector jobs present in the U.S. economy at a single point in time. Change in monthly employment level represents the increase or decrease in the total nonfarm private employment level since the prior month.

To obtain additional information about the ADP National Employment Report, access the full schedule of future release dates, and subscribe to monthly e-mail alerts and RSS feeds, please visit www.ADPemploymentreport.com. The October 2006 ADP National Employment Report will be released on Wednesday, November 1, 2006 at 8:15 a.m. EST.

About the ADP National Employment Report(SM)

The ADP National Employment Report, sponsored by ADP®, was developed and is maintained by Macroeconomic Advisers, LLC. It is a measure of employment based on a large, statistically significant, and anonymous subset of ADP payroll data that represents employees working in all 19 of the major North American Industrial Classification (NAICS) private industrial sectors. The data is collected for pay periods that include the week of the 12th of each month, and processed with statistical methodologies similar to those used by the U.S. Bureau of Labor Statistics (the BLS) to compute employment from its monthly survey of establishments.

Empirical analysis performed by Macroeconomic Advisers suggests that the ADP National Employment Report is a better advance indicator of the monthly change in establishment employment than available consensus forecasts, and that it anticipates revisions to the BLS measure.

For a description of the underlying data and the statistical properties of the series, please see “ADP National Employment Report: Development Methodology” at http://ADPemploymentreport.com/methodology.aspx.

About ADP:

Automatic Data Processing, Inc. (NYSE: ADP), with nearly $9 billion in revenues and more than 570,000 clients worldwide, is one of the largest providers of a broad range of premier, mission-critical, cost-effective transaction processing and information-based business solutions. Employer Services (ES), a division of ADP, offers the widest range of HR, payroll, and benefits administration solutions from a single source, to meet the extensive business needs of employers worldwide. Built with more than 50 years of industry experience, ADP ES’ cost-effective, easy-to-use solutions provide superior value to companies of all sizes. Approximately 540,000 companies rely on ADP ES for unparalleled service and compliance expertise, allowing them to focus on other core activities. For more information about ADP ES or to contact a local ADP sales office, reach us at 1.800.225.5237 or visit the company’s Web site at www.ADP.com.

About Macroeconomic Advisers, LLC

Macroeconomic Advisers, LLC (MA) has been the most trusted source for U.S. macroeconomic forecasts and commentary, monetary and fiscal policy analysis, and econometric modeling for over 20 years. MA has three primary service lines: (1) Macroeconomic Modeling. MA licenses its structural econometric model of the U.S. economy to firms who use it to produce their own macroeconomic forecasts; (2) U.S. Economic Forecasts. MA produces monthly economic forecasts, weekly economic commentaries, and analysis of economic indicators; (3) Monetary Policy Insights (MPI). Directed by MA co-founder and former Federal Reserve Board Governor Laurence Meyer, MPI ties MA’s economic forecasts to the prospective course of monetary policy and the resulting implications for fixed-income markets. MA’s clients include leading financial service firms, nonfinancial corporations, key policymaking agencies of the U.S. government, as well as State and Foreign Government agencies. Additional information on Macroeconomic Advisers, LLC is available on the company’s Web site, www.MacroAdvisers.com.

The ADP National Employment Report is a trademark and service mark of ADP of North America, Inc.

Contact Information

ADP Public Relations

Automatic Data Processing, Inc. (ADP)

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