Private libraries 231 Privatization 123 Public-private sector cooperation 106 Privateering 79 Rare books 79 History 77 Catalogs, Booksellers' 62 more ... Private collections 52 Finance 40 Infrastructure (Economics) 36 Library 32 Private equity 32 Economic policy 28 Catalogs, Book 26 Law and legislation 24 Private revelations 23 Private security services 23 Catalogs, Booksellers 22 Government policy 21 Private investigators 19 Art collections 18 Private schools 18 Privatization in education 18 Contracting out 16 Early printed books 16 Foreign relations 16 Private companies 16 Economic conditions 15 Book auctions 14 Management 14 less ...