Democrat Hillary Rodham Clinton is proposing $7 billion a year in tax incentives to encourage U.S. companies not to ship jobs overseas.

At an economic summit in Pittsburgh on Wednesday organized by her presidential campaign, the former first lady was expected to propose the elimination of tax breaks for companies that move jobs to other countries and use the savings to persuade companies to "insource" jobs in the U.S.

Clinton has focused on job creation and challenges to the U.S. economy at campaign appearances across Pennsylvania, whose primary is April 22. She is locked in a tight race for the Democratic nomination with rival Barack Obama, who has also stressed economic development in recent weeks.

Pennsylvania and other states holding upcoming primaries, including Indiana and Kentucky, have suffered the loss of manufacturing jobs in recent years and have yet to transition to new industries and other ways of expanding their economies.

Clinton's plan would offer new tax benefits for research and job development. It would also create "innovation and research clusters" across the country and provide $500 million annually in investments to encourage the creation of high-wage jobs in clean energy.