There is often considerable uncertainty about what a policy will accomplish, how effective in terms of its goals it will be, or the consequences that it will have for society. It is this uncertainty th at makes the study of policy implementation interesting and worthwhile. Policy implementation is neither a routine nor a very predictable process. Why some policies succeed and others fail remains a challenging puzzle. In actuality, it is frequently difficult, sometimes impossible, to neatly separate a policy's adoption from its implementation. Here again, we may find that the line between functional activities is smudgy. Statutes sometimes do not do