Intergenerational inequality refers to systematic differences in resources, opportunities, living conditions or economic and social outcomes between people belonging to different generations. A generation in this context is generally a group of people born during a similar period or sharing a particular stage of the historical life course, although definitions vary depending on the research question. Intergenerational inequality can concern income, wealth, housing, employment, education, health, pensions, environmental conditions, public debt, public services and access to future opportunities.
It is different from inequality between people of different ages at one point in time because age differences may reflect normal life-cycle processes. Intergenerational analysis instead asks whether the circumstances experienced by successive cohorts differ systematically because they entered adulthood, employment, housing markets or other institutions under different historical conditions.
Wealth is one of the most visible dimensions of intergenerational inequality because asset ownership accumulates over time and can be transferred between generations. Older cohorts may have had different opportunities to purchase housing, accumulate pensions or benefit from asset appreciation than younger cohorts entering the same markets later. Inheritance can transmit these differences directly to children and grandchildren. However, age alone cannot establish intergenerational inequality because older people have had more time to accumulate resources. Researchers therefore compare cohorts at equivalent ages or examine lifetime trajectories where possible. This distinction helps separate normal life-cycle accumulation from differences associated with the economic and institutional conditions experienced by particular generations.
Housing is particularly important because changes in property prices, rents, mortgage conditions, construction rates and household formation can affect generations differently. A cohort entering adulthood when homes are relatively affordable relative to earnings may have a greater opportunity to become homeowners than a cohort entering during a period of high prices and constrained supply. Home ownership can subsequently influence wealth accumulation because mortgage repayments can convert income into an asset while property appreciation can increase net worth.
People unable to purchase may spend a larger share of income on rent and accumulate fewer housing assets. Intergenerational housing differences can therefore compound over time and interact with parental wealth, because financial assistance from family can affect the ability to enter the housing market.
Employment conditions can also differ between generations. Cohorts entering the labour market during recessions may experience unemployment, lower starting wages or slower early-career progression, with possible effects that persist even after general economic conditions improve. Changes in employment structures can alter the prevalence of permanent, temporary, part-time or platform-based work. Pension systems can also create differences because some cohorts may spend much of their working lives under different rules concerning occupational pensions, state pensions and retirement ages.
Comparisons therefore need to consider the entire employment and pension system rather than focusing on a single annual income measure. The timing of economic shocks can matter because entering adulthood during a major downturn may affect long-term trajectories differently from experiencing the same downturn near retirement.
Intergenerational inequality is also linked to public spending and taxation. Different generations may contribute to and receive different amounts from systems of pensions, healthcare, education, social security and public infrastructure depending on their age and life stage. Public debt can create debates about how current spending affects future taxpayers, although the economic effects of debt depend on what borrowed funds finance, the interest rate, economic growth and the distribution of assets and liabilities.
Public investment can simultaneously create costs for current taxpayers and benefits for future generations. Intergenerational accounting therefore requires examining both transfers and the public assets and services that accompany them rather than treating government expenditure as a simple transfer from young people to old people.
Environmental conditions introduce another dimension of intergenerational inequality. Decisions made in one period can influence the environmental conditions experienced by people born later. Climate change, resource depletion, biodiversity loss, pollution and long-lived infrastructure can create costs or benefits that extend across generations. Conversely, investments in clean energy, environmental restoration, resilient infrastructure and scientific knowledge can provide benefits in the future. Environmental intergenerational analysis therefore concerns the distribution of opportunities and burdens over time rather than only the distribution of money. It is closely connected with sustainability because present consumption and investment decisions can alter the resource base available to future populations.
Intergenerational inequality should be distinguished from intragenerational inequality, which concerns differences among people within the same generation or age cohort. A society can have large inequality within every generation while also having substantial differences between generations. The two forms can interact because a younger person from a wealthy family may possess more resources than an older person from a poor family. Gender, class, education, ethnicity, geography and family wealth can therefore intersect with cohort differences. Analyses that treat generations as homogeneous groups risk overlooking substantial internal variation. Cohort comparisons are most informative when they combine generational analysis with socioeconomic and demographic detail.
Intergenerational inequality is ultimately about how historical timing affects the distribution of opportunities and resources across successive cohorts. It encompasses wealth, housing, employment, education, health, pensions, public services, taxation, environmental conditions and other factors whose effects persist over time. Accurate analysis requires distinguishing cohort effects from ordinary life-cycle differences and from broader historical or period effects that affect people of many ages simultaneously.
The concept is particularly useful for examining whether economic institutions, asset markets, public policies and environmental decisions create systematically different starting conditions for people born at different times. Because generations are internally diverse, conclusions should be based on cohort-level evidence while recognising differences within each cohort and the role of family transfers in transmitting advantages and disadvantages.
