| Alan Guttmacher Institute www.agi-usa.org | |
| Alexis de Tocqueville Institution www.adti.net | |
| Amer. Enterprise Institute for Public Policy Research www.aei.org | |
| Amer. Institute for Contemporary German Studies www.aicgs.org | |
| Amer. Institute for Research www.air-dc.org | |
| Amer. Legislative Exchange Council www.alec.org | |
| Amer. Savings Education Council www.asec.org | |
| Amer. Tax Policy Institute www.americantax.org | |
| Americans Back in Charge Fndt. www.abic.org | |
| ANSER www.anser.org | |
| Asia Pacific Policy Center www.appcusa.org | |
| The Aspen Institute www.aspeninstitute.org | |
| The Atlantic Council of the U.S. www.acus.org | |
| Battelle Memorial Institute www.battelle.org | |
| Biophysical Society www.biophysics.org/biophys/society | |
| British American Security Information Council www.basicint.org | |
| Brookings Institution www.brookings.edu | |
| The Capital Research Center www.capitalresearch.org | |
| Carnegie Endowment for Intl. Peace www.ceip.org | |
| Carnegie Institution of Washington www.carnegieinstitution.org | |
| Cato Institute www.cato.org | |
| Center for Defense Information www.cdi.org | |
| Center for Democracy www.centerfordemocracy.org | |
| The Center for Equal Opportunity www.ceousa.org | |
| Center for Immigration Studies www.cis.org | |
| Center for Intl. Environmental Law www.ciel.org | |
| Center for Intl. Policy www.cipoline.org/ | |
| Center for Intl. Private Enterprise www.cipe.org | |
| Center for National Policy www.cnponline.org | |
| Center for Policy Alternatives www.stateaction.org | |
| Center for Public Integrity www.publicintegrity.org | |
| Center for Public Justice www.cpjustice.org | |
| Center for Strategic & Budgetary Assessments www.csbaonline.org | |
| Center for Strategic & Intl. Studies www.csis.org | |
| Center for the Study of Social Policy www.cssp.org | |
| Center on Budget & Policy Priorities www.cbpp.org | |
| Center on Policy Attitudes & the Program on Intl. Policy Attitudes www.policyattitudes.org | |
| Chemical & Biological Arms Control Inst. www.cbaci.org | |
| The CNA Corp. www.cna.org | |
| Committee for Economic Development www.ced.org | |
| Competitive Enterprise Institute www.cei.org | |
| The Congressional Institute Inc. www.conginst.org | |
| Consumer Energy Council of America Research Fndt. www.cecarf.org | |
| Council for Excellence in Government www.excelgov.org | |
| Council on Competitiveness www.compete.org | |
| Council on Foreign Relations www.foreignrelations.org | |
| Council on Hemispheric Affairs. (COHA) www.coha.org | |
| Economic Policy Institute www.epinet.org | |
| Economic Strategy Institute www.econstrat.org | |
| The Eisenhower Institute www.eisenhowerinstitute.org | |
| Employee Benefit Research Institute www.ebri.org | |
| Employment Policies Institute www.epionline.org | |
| Environmental & Energy Study Institute www.eesi.org | |
| Environmental Law Institute www.eli.org | |
| Ethics & Public Policy Center www.eppc.org | |
| The European Institute www.europeaninstitute.org | |
| Fair Government Foundation www.fgf.org | |
| Forum for International Policy www.ffi.com | |
| The Foundation Center www.fdncenter.org | |
| Foundation for Future Leadership www.futureleadership.org | |
| Foundation for Public Affairs www.pac.org | |
| The Freedom Alliance www.freedomalliance.org | |
| The Fund for Peace www.fundforpeace.org | |
| George C. Marshall Institute www.marshall.org | |
| George Meany Center for Labor Studies/The National Labor College www.georgemeany.org | |
| German Marshall Fund of the United States www.gmfus.org | |
| The Henry L. Stimson Center www.stimson.org | |
| Heritage Foundation www.heritage.org | |
| Hudson Institute www.hudson.org | |
| IIT Research Institute www.iitri.org | |
| Initiative & Referendum Inst. www.iandrinstitute.org | |
| Institute for Alternative Futures www.altfutures.com | |
| Institute for Defense Analyses www.ida.org | |
| Institute for Foreign Policy Analysis www.ifpa.org | |
| Institute for Health Policy Solutions www.ihps.org | |
| Institute for Intl. Economics www.iie.com | |
| Institute for Justice www.ij.org | |
| Institute for Policy Studies www.ips-dc.org | |
| Institute for Research on the Economics of Taxation (IRET) www.iret.org | |
| Institute of Gas Technology www.igt.org | |
| Institute of Medicine www.iom.edu | |
| Internet Policy Inst. www.internetpolicyinst.org | |
| Intl. Foundation for Election Systems www.ifes.org | |
| Intl. Law Institute www.ili.org | |
| The Intl. Management & Development Institute www.members.aol.com/imdiweb | |
| Investor Responsibility Research Center www.irrc.com | |
| Johns Hopkins Univ. Foreign Policy Institute (SAIS) www.sais-jhu.edu/centers/fpi | |
| Joint Center for Political & Economic Studies www.jointcenter.org | |
| The Justice Policy Inst. www.cjcj.org | |
| The Leadship Institute www.leadershipinstitute.org | |
| The Lexington Institute www.lexingtoninstitute.org | |
| The Lindesmith Center/Drug Policy Foundation www.drugpolicy.org | |
| Logistics Management Institute www.lmi.org | |
| Mathematica Policy Research, Inc. www.mathematica-mpr.com | |
| The Middle East Institute www.themiddleeastinstitute.org | |
| Natl. Academy of Engineering www.nae.edu | |
| Natl. Academy of Public Administration www.napawash.org | |
| Natl. Center for Policy & Research for Women and Families www.cpr4womenandfamilies.org | |
| Natl. Center for Policy Analysis www.ncpa.org | |
| The Natl. Center for Public Policy Research www.nationalcenter.org | |
| Natl. Center on Education & the Economy www.ncee.org | |
| Natl. Democratic Institute for Intl. Affairs www.ndi.org | |
| Natl. Environmental Policy Institute www.nepi.org | |
| Natl. Health Policy Forum www.nhpf.org | |
| Natl. Institute for Public Policy www.nipp.org | |
| Natl. Policy Assn. www.npal.org | |
| Natl. Research Council www.nas.edu | |
| Natl. Security Archive (GWU) www.nsarchive.org | |
| New America Fndt. www.newamerica.net | |
| New Directions for Policy www.ndpolicy. com | |
| Northeast-Midwest Institute www.nemw.org | |
| The Philanthropy Roundtable www.philanthropyroundtable.org | |
| Pinchot Institute for Conservation www.pinchot.org | |
| Population Reference Bureau www.prb.org | |
| Potomac Institute for Policy Studies www.potomacinstitute.org | |
| Progress & Freedom Foundation www.pff.org | |
| Progressive Policy Institute www.ppionline.org | |
| Public Forum Institute www.publicforuminstitute.com | |
| Public Service Research Fndt. www.psrf.org | |
| RAND www.rand.org | |
| Resources for the Future www.rff.org | |
| Ripon Society www.riponsociety.org | |
| SRI Intl. www.sri.com | |
| Tax Foundation www.taxfoundation.org | |
| Urban Institute www.urban.org | |
| Washington Institute for Near East Policy www.washingtoninstitute.org | |
| Woodrow Wilson Intl. Center for Scholars wwics.si.edu | |
| World Resources Institute www.wri.org | |
| Worldwatch Institute www.worldwatch.org |