بررسی و ارزیابی مشارکت نیروی کار ایران تا سال 1440 با استفاده از رویکرد پویایی شناسی سیستم‌ها

Abstract

Purpose

This research aims to analyze and forecast Iran’s labor force participation rate (LFPR) up to the horizon of 1440 (2061) using a system dynamics modeling approach. Recognizing LFPR as a core indicator of labor market performance and productive capacity, the study seeks to identify, quantify, and simulate the key socio economic and demographic determinants affecting participation behavior in Iran. The overarching goal is to provide policy makers with a dynamic analytical framework that allows forecasting medium and long term trends, testing policy impacts prior to implementation, and designing coordinated interventions that enhance employment and economic resilience.



Methodology

The study employs the System Dynamics (SD) framework, implemented through Vensim software, to simulate and analyze interactions among core variables within the labor supply system. The model incorporates interlinked sub systems corresponding to demographic, social, and economic drivers—namely: age structure, fertility rate, marital status, investment levels, and the degree of job search discouragement.

Historical data were used to calibrate and validate the model, ensuring its structural and behavioral validity over multiple social and economic cycles.

Three model configurations were tested:

1. Base scenario, representing continuation of current trajectories;

2. Optimistic (ideal) scenario, assuming successful policy interventions leading to higher investment, moderate fertility recovery, and lower discouragement;

3. Pessimistic (adverse) scenario, involving external economic shocks (sanctions), reduced investment, and deteriorating labor market sentiment.

Validation tests confirmed the model’s consistency and capacity to predict plausible long term trends, with sensitivity analysis reinforcing robustness against parameter uncertainty.



Findings and Discussion

Simulation results underscore the interdependence among demographic and economic subsystems. In the baseline trajectory, Iran’s LFPR stabilizes around 45 percent by 1440, reflecting a prolonged equilibrium shaped by demographic decline (aging population and delayed marriage) and moderate economic stagnation.

Under the ideal scenario, the system exhibits sustained positive feedback: increased fertility and earlier marriage expand the working age population, while optimistic expectations stimulate higher investment and job creation. The LFPR rises to 60 percent with approximately 35 million employed persons—a state corresponding to balanced demographic renewal and economic vitality.

Conversely, the adverse scenario reveals the reinforcing power of negative loops. A 10 percent reduction in investment combined with a 10 percent rise in discouragement pushes LFPR below 40 percent and total employment to 18 million. Reduced employment further weakens demand and investment in subsequent periods, forming a self reinforcing recessionary spiral.

The model identifies marriage age and discouragement rate as high leverage variables. Delay in marriage shortens effective fertility periods, producing a cumulative reduction in labor supply over decades—an effect economic stimuli alone cannot promptly offset. Simultaneously, rising discouragement detaches individuals from the labor market even when job opportunities exist, highlighting a critical behavioral dimension absent from static econometric models.

The results affirm the systemic nature of Iran’s labor participation challenge: improvements or regressions in one domain (e.g. demographics) propagate through feedback loops to other domains (e.g. investment, consumption, fertility), producing nonlinear and path dependent outcomes. Hence, any sustainable solution must account for these feedback mechanisms rather than adopting isolated, short term measures.



Conclusions and Policy Implications

The system dynamics simulations reveal that Iran’s labor participation trajectory can evolve toward two contrasting steady states:

• a sustainable growth regime (LFPR ≈ 60%) achievable through synchronised social and economic reforms; or

• a stagnation regime (LFPR < 40%), triggered by persistent demographic and investment weaknesses.

To shift from the baseline (≈45%) toward the growth regime, three coordinated policy clusters are essential:

1. Demographic Stabilization and Early Marriage Incentives

o The persistent delay in marriage has curtailed aggregate fertility and future labor inflows. Current pro fertility policies have largely failed to reverse this delay. A paradigm shift is required toward economic and social facilitation of marriage in the late 20s age window. Measures include housing and employment guarantees for young adults, educational reforms supporting family formation, and cultural campaigns reframing early marriage as investment in national human capital.

2. Strategic Investment and Sanction Mitigation Policies

o Considering the documented negative long and short term effects of sanctions on capital formation (Khatari et al., 2021), policies must focus on systemic risk reduction in the investment environment. Enhancing domestic technological capacity, diversifying trade partnerships, and developing regional investment compacts can partially neutralize external shocks. Strengthening the business ecosystem—through legal transparency, financial stability, and innovation incentives—is critical to prevent activation of recessionary feedback loops.

3. Managing Labor Market Expectations and Reducing Discouragement

o Statistical evidence (Statistical Center of Iran, 1403) indicates declining participation despite stable employment shares—implying withdrawal from job seeking. The key policy thus lies in restoring long term confidence among job seekers by fostering continuous, stable employment rather than ad hoc short term jobs. Sustainable economic growth hinges on psychological engagement of the workforce; consequently, LFPR, not unemployment alone, should become the central monitoring indicator.

Overall, the system dynamics analysis highlights that Iran’s labor participation issue transcends mere numerical trends—it reflects a complex adaptive system where social behavior, demographic momentum, and macroeconomic forces interact over decades. Effective policies must therefore aim at activating positive feedbacks across these sectors simultaneously.

In conclusion, moving Iran’s LFPR from the baseline 45 percent to the ideal 60 percent target demands integrated, long horizon, and feedback oriented policy design, combining demographic support, investment expansion, and expectation management. This integrative perspective ensures that temporary improvements translate into lasting structural progress and that the country fully capitalizes on its remaining demographic window of opportunity.