The ratings outlook for nonprofit higher education's 2011 remains mixed, according to a report  issued Monday by Standard & Poor's. In 2011, "operating results and demand will likely be uneven, and institutions with high debt and limited liquidity could experience severe stress," according to the report. However, "many institutions will perform favorably over the next year," and, in the long-term, the credit profile remains stable. Standard & Poor's does not expect public colleges as a whole to face more serious difficulties than private colleges -- despite state funding cuts. But the credit-rating agency projects that public four-year colleges will experience increased competition from both private and community colleges.