Interest groups frequently get information from public agencies and pass it to their members.Interest groups are vehicles for political participation.They are a means through which likeminded citizens can pull their resources and channel their energies into collective political action.Some interest groups have an influence far out of proportion to their size,or for that matter,to their importance or contribution to the public good.Thus,the contest over who gets what,when and how is not always a fair fight.The more highly organized and better financed groups often have a decided advantage in that struggle.