CRA International's NeuCo Subsidiary to Acquire Pegasus Technologies; Expected Acquisition of Power Industry Software Solutions Provider to Expand NeuCo's Product Offerings, Geographic Reach and Patent Library.

BOSTON -- CRA International, Inc. (NASDAQ: CRAI), a worldwide leader in providing economic, financial, and management consulting services, today announced that its NeuCo subsidiary has signed a definitive agreement to acquire Ohio-based Pegasus Technologies, a majority-owned subsidiary of Rio Tinto Energy America Services Company (formerly Kennecott Energy Company and a member of the Rio Tinto Group). Pegasus has been providing optimization software solutions to the power industry for more than 20 years. The acquisition is subject to customary closing conditions and is expected to close in the third quarter of 2006.

The terms call for NeuCo to acquire 100 percent of the issued and outstanding shares of Pegasus. In exchange, the current Pegasus equity holders will receive an equity interest equal to 26.5 percent of the outstanding common stock and equivalents in NeuCo post-transaction, and annual cash payments subject to the achievement of certain performance metrics with a minimum aggregate value of $3.5 million. In addition, the transaction will terminate current litigation stemming from a patent infringement lawsuit brought by Pegasus against NeuCo.

As a result of the transaction, CRA's ownership interest in NeuCo will decline to approximately 36 percent. This reduction will require CRA to de-consolidate NeuCo from CRA's financial statements prospectively following the closing of the transaction. CRA currently plans to announce its second-quarter fiscal 2006 financial results in early June and will discuss the impact of this transaction on its financial guidance for fiscal 2006 at that time.

"This transaction brings together two firms that have been 100 percent dedicated to delivering optimization software solutions that mitigate the emissions and competitive market pressures facing the electric power industry. I am extremely excited about working with the Pegasus team and customers, many of whom were the early optimization visionaries in electric power," said Curt Lefebvre, NeuCo's president and chief executive officer. "From a geographic perspective, this acquisition expands NeuCo's North American business and provides an entree into the Asian market through Pegasus' current operations in China. In addition, acquiring Pegasus provides NeuCo with access to U.S. Department of Energy funding for the development of mercury solutions and other emissions reductions, and transfers to NeuCo control of the power market's most comprehensive library of neural network and other technology patents."

"NeuCo is a recognized leader in the optimization of electric power plants," said Mark Roberts, sales and marketing director of Rio Tinto Energy America. "We are proud to become an investor in NeuCo and remain committed to efforts that enhance the efficiency and reduce the emissions of coal-burning power plants. NeuCo and Rio Tinto Energy America share a common interest in reducing emissions."

About NeuCo, Inc.

NeuCo is a leading provider of optimization software solutions that help electric power producers reduce emissions, increase efficiency and improve availability. NeuCo provides a comprehensive suite of optimization software products that help power generators improve their emissions, operating and competitive profiles. NeuCo's shareholders currently include CRA International (Nasdaq: CRAI), NStar and employees. More information about NeuCo can be found on the company's web site at www.neuco.net.

About CRA

Founded in 1965, CRA International is a leading provider of economic and financial expertise and management consulting services. Working with businesses, law firms, accounting firms, and governments, CRA is the preferred consulting firm for complex assignments with pivotal and high-stakes outcomes. The firm is distinguished by a unique combination of credentials: deep vertical experience in a variety of industries; broad horizontal expertise in a range of functional disciplines; and rigorous economic, financial, and market analysis. CRA offers a proven track record of thousands of successful engagements in regulatory and litigation support, business strategy and planning, market and demand forecasting, policy analysis, and engineering and technology management. Headquartered in Boston, the firm has more than a dozen offices within the United States and ten offices in Canada, Europe, the Middle East, and the Asia Pacific region. Detailed information about CRA is available at www.crai.com.

Statements in this press release concerning NeuCo's acquisition of Pegasus Technologies may be considered "forward-looking" statements as defined in the Private Securities Litigation Reform Act of 1995. Such statements are based on management's current expectations and are subject to a number of factors and uncertainties. Information contained in these forward-looking statements is inherently uncertain, and actual performance and results may differ materially. Such factors that could cause actual results to differ materially from any forward-looking statements contained in this press release include, among others, the possibility that the proposed acquisition of Pegasus does not close, delays in closing the proposed acquisition of Pegasus, difficulties in integrating Pegasus' business and personnel into NeuCo's existing operations, undisclosed or unanticipated expenses or liabilities associated with the acquisition, acquisition costs, the potential loss of clients, and the potential loss of key personnel. Further information on these and other potential factors that could affect CRA's financial results is included in CRA's filings with the Securities and Exchange Commission. CRA undertakes no obligation to update any of its forward-looking statements after the date of this press release.