old_contents: VAR_LABELS = {'Y': 'GDP ($Y_t$)', 'C': 'Consumption ($C_t$)',
                'K': 'Capital Stock ($K_t$)', 'L': 'Labor ($L_t$)',
                'nssmat': 'Labor Supply', 'n_mat': 'Labor Supply'}
  
  ToGDP_LABELS = {'D': 'Debt-to-GDP ($D_{t}/Y_t$)'}
  
new_contents: VAR_LABELS = {'Y': 'GDP ($Y_t$)', 'C': 'Consumption ($C_t$)',
                'L': 'Labor ($L_t$)', 'G': 'Government Expenditures',
                'T_H': 'Lump sum transfers',
                'B': 'Wealth ($B_t$)', 'I_total': 'Investment ($I_t$)',
                'K': 'Capital Stock ($K_t$)',
                'K_d': 'Domestically-owned Capital Stock ($K^d_t$)',
                'K_f': 'Foreign-owned Capital Stock ($K^f_t$)',
                'D': 'Government Debt ($D_t$)',
                'D_d': 'Domestically-owned Gov Debt ($D^d_t$)',
                'D_f': 'Foreign-owned Gov Debt ($D^f_t$)',
                'r': 'Real interest rate ($r_t$)',
                'r_gov': 'Real interest rate on gov debt ($r_{gov,t}$)',
                'r_hh': 'Real interest rate on HH portfolio ($r_{hh,t}$)',
                'w': 'Wage rate', 'BQ': 'Aggregate bequests ($BQ_{j,t}$)',
                'total_revenue': 'Total tax revenue ($REV_t$)',
                'business_revenue': 'Business tax revenue',
                'IITpayroll_revenue': 'IIT and payroll tax revenue',
                'n_mat': 'Labor Supply ($n_{j,s,t}$)',
                'c_path': 'Consumption ($c_{j,s,t}$)',
                'bmat_splus1': 'Savings ($b_{j,s+1,t+1}$)',
                'bq_path': 'Bequests ($bq_{j,s,t}$)',
                'bmat_s': 'Savings ($b_{j,s,t}$)',
                'y_before_tax_mat': 'Before tax income',
                'etr_path': 'Effective Tax Rate ($ETR_{j,s,t}$)',
                'mtrx_path':
                'Marginal Tax Rate, Labor Income ($MTRx_{j,s,t}$)',
                'mtry_path':
                'Marginal Tax Rate, Capital Income ($MTRy_{j,s,t}$)',
                'tax_path':
                'Total Taxes',
                'nssmat': 'Labor Supply ($\\bar{n}_{j,s}$)',
                'bssmat_s': 'Savings ($\\bar{b}_{j,s}$)',
                'bssmat_splus1': 'Savings ($\\bar{n}_{j,s+1}$)',
                'cssmat': 'Consumption ($\\bar{c}_{j,s}$)',
                'yss_before_tax_mat': 'Before-tax Income',
                'etr_ss': 'Effective Tax Rate ($\\bar{ETR}_{j,s}$)',
                'mtrx_ss':
                'Marginal Tax Rate, Labor Income ($\\bar{MTRx}_{j,s}$)',
                'mtry_ss':
                'Marginal Tax Rate, Capital Income ($\\bar{MTRy}_{j,s}$)'
                }
  
  ToGDP_LABELS = {'D': 'Debt-to-GDP ($D_{t}/Y_t$)',
                  'D_d': 'Domestically-owned Debt-to-GDP ($D^d_{t}/Y_t$)',
                  'D_f': 'Foreign-owned Debt-to-GDP ($D^f_{t}/Y_t$)',
                  'G': 'Govt Spending-to-GDP ($G_{t}/Y_t$)',
                  'K': 'Capital-Output Ratio ($K_{t}/Y_t$)',
                  'K_d':
                  'Domestically-owned Capital-Output Ratio ($K^d_{t}/Y_t$)',
                  'K_f':
                  'Foreign-owned Capital-Output Ratio ($K^f_{t}/Y_t$)',
                  'C': 'Consumption-Output Ratio ($C_{t}/Y_t$)',
                  'I': 'Investment-Output Ratio ($I_{t}/Y_t$)',
                  'total_revenue': 'Tax Revenue-to-GDP ($REV_{t}/Y_t$)'}
  
subject: add more labels