PSLmodels · rickecon · Apr 3, 2026 · Apr 1, 2026 · Apr 2, 2026 · Apr 2, 2026
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -5,19 +5,25 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [0.15.4] - 2025-01-27 12:00:00
+## [0.15.5] - 2026-01-27 12:00:00
+
+### Added
+
+- Additional parameter metadata to `default_parameters.json`.  See PR [#1097](https://github.com/PSLmodels/OG-Core/pull/1097)
+
+## [0.15.4] - 2026-01-27 12:00:00
 
 ### Added
 
 - Ability to simulate the model with a single type of household (`J=1`).  See PR [#1062](https://github.com/PSLmodels/OG-Core/pull/1062)
 
-## [0.15.3] - 2025-01-24 12:00:00
+## [0.15.3] - 2026-01-24 12:00:00
 
 ### Added
 
 - Two new parameters, `income_tax_filer` and `wealth_tax_filer`, that determine whether certain types `j` pay income or wealth taxes, respectively.  See PR [#1084](https://github.com/PSLmodels/OG-Core/pull/1084)
 
-## [0.15.2] - 2025-01-22 12:00:00
+## [0.15.2] - 2026-01-22 12:00:00
 
 ### Added
 
@@ -511,6 +517,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Any earlier versions of OG-USA can be found in the [`OG-Core`](https://github.com/PSLmodels/OG-Core) repository [release history](https://github.com/PSLmodels/OG-Core/releases) from [v.0.6.4](https://github.com/PSLmodels/OG-Core/releases/tag/v0.6.4) (Jul. 20, 2021) or earlier.
 
 
+[0.15.5]: https://github.com/PSLmodels/OG-Core/compare/v0.15.4...v0.15.5
 [0.15.4]: https://github.com/PSLmodels/OG-Core/compare/v0.15.3...v0.15.4
 [0.15.3]: https://github.com/PSLmodels/OG-Core/compare/v0.15.2...v0.15.3
 [0.15.2]: https://github.com/PSLmodels/OG-Core/compare/v0.15.1...v0.15.2

diff --git a/ogcore/__init__.py b/ogcore/__init__.py
@@ -20,4 +20,4 @@
 from ogcore.txfunc import *
 from ogcore.utils import *
 
-__version__ = "0.15.4"
+__version__ = "0.15.5"
diff --git a/ogcore/constants.py b/ogcore/constants.py
@@ -55,170 +55,6 @@
     },
 }
 
-
-PARAM_LABELS = {
-    "start_year": ["Initial year", r"$\texttt{start\_year}$"],
-    # 'Gamma': ['Initial distribution of savings', r'\hat{\Gamma}_{0}'],
-    # 'N': ['Initial population', 'N_{0}'],
-    "omega": ["Population by age over time", r"$\omega_{s,t}$"],
-    # 'fert_rates': ['Fertility rates by age',
-    #                r'$f_{s,t}$'],
-    "imm_rates": ["Immigration rates by age", r"$i_{s,t}$"],
-    "rho": ["Mortality rates by age", r"$\rho_{s,t}$"],
-    "e": ["Deterministic ability process", r"$e_{j,s,t}$"],
-    "lambdas": [
-        "Lifetime income group percentages",
-        r"$\lambda_{j}$",
-    ],
-    "J": ["Number of lifetime income groups", "$J$"],
-    "S": ["Maximum periods in economically active individual life", "$S$"],
-    "E": ["Number of periods of youth economically outside the model", "$E$"],
-    "T": ["Number of periods to steady-state", "$T$"],
-    "retirement_age": ["Retirement age", "$R$"],
-    "ltilde": ["Maximum hours of labor supply", r"$\tilde{l}$"],
-    "beta": ["Discount factor", r"$\beta$"],
-    "sigma": ["Coefficient of constant relative risk aversion", r"$\sigma$"],
-    "frisch": ["Frisch elasticity of labor supply", r"$\nu$"],
-    "b_ellipse": ["Scale parameter in utility of leisure", "$b$"],
-    "upsilon": ["Shape parameter in utility of leisure", r"$\upsilon$"],
-    # 'k': ['Constant parameter in utility of leisure', 'k'],
-    "chi_n": [
-        "Disutility of labor level parameters",
-        r"$\chi^{n}_{s}$",
-    ],
-    "chi_b": [
-        "Utility of bequests level parameters",
-        r"$\chi^{b}_{j}$",
-    ],
-    "use_zeta": [
-        "Whether to distribute bequests between lifetime income groups",
-        r"$\texttt{use\_zeta}$",
-    ],
-    "zeta": ["Distribution of bequests", r"$\zeta$"],
-    "Z": ["Total factor productivity", "$Z_{t}$"],
-    "gamma": ["Capital share of income", r"$\gamma$"],
-    "epsilon": [
-        "Elasticity of substitution between capital and labor",
-        r"$\varepsilon$",
-    ],
-    "delta": ["Capital depreciation rate", r"$\delta$"],
-    "g_y": [
-        "Growth rate of labor augmenting technological progress",
-        r"$g_{y}$",
-    ],
-    "tax_func_type": [
-        "Functional form used for income tax functions",
-        r"$\texttt{tax\_func\_type}$",
-    ],
-    "analytical_mtrs": [
-        "Whether use analytical MTRs or estimate MTRs",
-        r"$\texttt{analytical\_mtrs}$",
-    ],
-    "age_specific": [
-        "Whether use age-specific tax functions",
-        r"$\texttt{age\_specific}$",
-    ],
-    "tau_payroll": ["Payroll tax rate", r"$\tau^{p}_{t}$"],
-    # 'theta': ['Replacement rate by average income',
-    #           r'\left{\theta_{j}\right}_{j=1}^{J}'],
-    "tau_bq": ["Bequest (estate) tax rate", r"$\tau^{BQ}_{t}$"],
-    "tau_b": ["Entity-level business income tax rate", r"$\tau^{b}_{t}$"],
-    "delta_tau": [
-        "Rate of depreciation for tax purposes",
-        r"$\delta^{\tau}_{t}$",
-    ],
-    "tau_c": ["Consumption tax rates", r"$\tau^{c}_{t,s,j}$"],
-    "h_wealth": ["Coefficient on linear term in wealth tax function", "$H$"],
-    "m_wealth": ["Constant in wealth tax function", "$M$"],
-    "p_wealth": ["Coefficient on level term in wealth tax function", "$P$"],
-    "budget_balance": [
-        "Whether have a balanced budget in each period",
-        r"$\texttt{budget\_balance}$",
-    ],
-    "baseline_spending": [
-        "Whether level of spending constant between "
-        + "the baseline and reform runs",
-        r"$\texttt{baseline\_spending}$",
-    ],
-    "alpha_T": ["Transfers as a share of GDP", r"$\alpha^{T}_{t}$"],
-    "eta": ["Distribution of transfers", r"$\eta_{j,s,t}$"],
-    "eta_RM": ["Distribution of remittances", r"$\eta_{RM,j,s,t}$"],
-    "alpha_G": ["Government spending as a share of GDP", r"$\alpha^{G}_{t}$"],
-    "alpha_RM_1": [
-        "Remittances as a share of GDP in initial period",
-        r"$\alpha_{RM,1}$",
-    ],
-    "alpha_RM_T": [
-        "Remittances as a share of GDP in long run",
-        r"$\alpha_{RM,T}$",
-    ],
-    "g_RM": ["Growth rate of remittances in initial periods", r"$g_{RM,t}$"],
-    "tG1": ["Model period in which budget closure rule starts", r"$t_{G1}$"],
-    "tG2": ["Model period in which budget closure rule ends", r"$t_{G2}$"],
-    "rho_G": ["Budget closure rule smoothing parameter", r"$\rho_{G}$"],
-    "debt_ratio_ss": ["Steady-state Debt-to-GDP ratio", r"$\bar{\alpha}_{D}$"],
-    "initial_debt_ratio": [
-        "Initial period Debt-to-GDP ratio",
-        r"$\alpha_{D,0}$",
-    ],
-    "r_gov_scale": [
-        "Scale parameter in government interest rate wedge",
-        r"$\tau_{d,t}$",
-    ],
-    "r_gov_shift": [
-        "Shift parameter in government interest rate wedge",
-        r"$\mu_{d,t}$",
-    ],
-    "avg_earn_num_years": [
-        "Number of years over which compute average earnings for pension benefit",
-        r"$\texttt{avg\_earn\_num\_years}$",
-    ],
-    "AIME_bkt_1": ["First AIME bracket threshold", r"$\texttt{AIME\_bkt\_1}$"],
-    "AIME_bkt_2": [
-        "Second AIME bracket threshold",
-        r"$\texttt{AIME\_bkt\_2}$",
-    ],
-    "PIA_rate_bkt_1": [
-        "First AIME bracket PIA rate",
-        r"$\texttt{PIA\_rate\_bkt\_1}$",
-    ],
-    "PIA_rate_bkt_2": [
-        "Second AIME bracket PIA rate",
-        r"$\texttt{PIA\_rate\_bkt\_2}$",
-    ],
-    "PIA_rate_bkt_3": [
-        "Third AIME bracket PIA rate",
-        r"$\texttt{PIA\_rate\_bkt\_3}$",
-    ],
-    "PIA_maxpayment": ["Maximum PIA payment", r"$\texttt{PIA\_maxpayment}$"],
-    "PIA_minpayment": ["Minimum PIA payment", r"$\texttt{PIA\_minpayment}$"],
-    "replacement_rate_adjust": [
-        "Adjustment to replacement rate",
-        r"$\theta_{adj,t}$",
-    ],
-    "world_int_rate": ["World interest rate", r"$r^{*}_{t}$"],
-    "initial_foreign_debt_ratio": [
-        "Share of government debt held by foreigners in initial period",
-        r"$D_{f,0}$",
-    ],
-    "zeta_D": [
-        "Share of new debt issues purchased by foreigners",
-        r"$\zeta_{D, t}$",
-    ],
-    "zeta_K": [
-        "Share of excess capital demand satisfied by foreigners",
-        r"$\zeta_{K, t}$",
-    ],
-    "nu": ["Dampening parameter for TPI", r"$\xi$"],
-    "maxiter": ["Maximum number of iterations for TPI", r"$\texttt{maxiter}$"],
-    "mindist_SS": ["SS solution tolerance", r"$\texttt{mindist\_SS}$"],
-    "mindist_TPI": ["TPI solution tolerance", r"$\texttt{mindist\_TPI}$"],
-}
-
-# Ignoring the following:
-# 'starting_age', 'ending_age', 'constant_demographics',
-# 'constant_rates', 'zero_taxes'
-
 # List of deviation factors for initial guesses of r and TR used in
 # SS.run_SS for a more robust SS solution
 DEV_FACTOR_LIST = [