Diagnostics of Models for Cosmic Structure Formation

In this talk I shall discuss two topics related to modeling of cosmic structure formation. In the first part I shall briefly review the problem of cosmologica! parameters, which are crucial for any of model calculations. An emphasis is made on whether we need a non-zero cosmologica! constant. In the latter part cosmic microwave background (CMB) anisotropics are discussed as a probe of the models for cosmic structure formation.