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. 2015 Jun 24;10(6):e0130119. doi: 10.1371/journal.pone.0130119

Table 9. Cash and Investment Security Variables.

Variable Name Census Code Description
Total Cash and Securities The sum of all cash and securities held
    Insurance Trust Cash and Securities The sum of retirement and unemployment investments
        Employee Retirement Cash and Sec. The sum of all employee retirement cash and security amounts
            Employee Retirement Cash X21 Cash held by the employee retirement system
            Employee Retirement Securities The sum of the following two subcategories
            Federal Securities X30 Amount invested in federal government securities
            Non-Governmental Securities The sum of the following five variables
                Corporate Bonds Z77 All forms of corporate debt
                Corporate Stock Z78 All forms of corporate equity investments
                Mortgages X42 Mortgages owed to the retirement system
                Other Investments X44 Mutual funds, international investments, loans to members and several other investments
                Miscellaneous Investments X47 All investments of the retirement system NEC
                State and Local Government Sec. X35 Included in X44 but also reported separately
        Unemployment Cash and Securities The sum of the following two variables
            Unemployment in US Treasuries Y07 The balance held in federal securities
            Other Unemployment Balances Y08 Negative when states borrow from the federal gov.
    Non-Insurance Trust Cash and Sec. The sum of the following three variables
        Sinking Fund Cash and Securities W01 Funds held in order to service debt
        Bond Fund Cash and Securities W31 Proceeds of bond issues awaiting disbursement
         Other Non-Insurance Trust C&S W61 All other non-insurance trust cash and investments

This table describes the coding of the cash and investment security variables and provides a short description of each. NEC stands for not elsewhere classified. The indentation of the variables in the first column indicates how subcategories of data collapse into larger categories. More detailed descriptions of each variable can be found in the Census’ 2006 classification manual (http://www.census.gov/govs/classification/) included with the database download.