Social Mobility: Five Terraces Model

What is Social Mobility?

Social mobility refers to the movement of individuals or groups within the social hierarchy. This can be upward (improving one's socioeconomic status), downward (declining in status), or horizontal (remaining at the same level). The five-terrace model simplifies this complex phenomenon into a structured, observable process.

In economics and sociology, understanding social mobility is crucial for policy-making and addressing issues of inequality.

The Five-Terrace Model

The five-terrace model represents different levels of socioeconomic status. Each terrace corresponds to a specific class or level within the hierarchy.

Agents in this model move between terraces based on predefined probabilities, reflecting real-world persistence and upward bias.

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Markov Chains and Stationary Distribution

A Markov chain is a stochastic process where future states depend only on the current state. In the context of social mobility, this means that an individual's next move depends solely on their current position.

The stationary distribution represents the long-term probability distribution over all terraces. Over time, if the model reaches equilibrium, it will reflect the stable distribution of agents across different classes.

Persistence and Upward Bias

Persistence in social mobility means that individuals tend to remain in their current class or move only slightly up or down. This reflects the idea that socioeconomic status is often inherited.

Upward bias refers to a tendency for agents to move upward more frequently than downward, indicating a preference for improvement and progress within the model.

Frequently asked questions

How does the five-terrace model differ from other social mobility models?

The five-terrace model provides a structured approach to understanding social stratification through a Markov chain, offering insights into persistence and upward bias in a clear, visual format.

Why is it important to study social mobility using this 3D model?

Studying social mobility with a 3D model allows for a more intuitive understanding of the dynamics involved, making complex concepts accessible and providing a tangible representation of abstract ideas.

Can the stationary distribution be used to predict future trends in social mobility?

While the stationary distribution provides insights into long-term equilibrium states, it cannot predict exact future trends due to the stochastic nature of individual movements within the model.

How does this 3D model relate to real-world social dynamics?

The five-terrace model simplifies complex social dynamics but can provide a framework for understanding and analyzing real-world data, offering insights into economic and social stratification patterns.

Try it live

Everything above runs in your browser — open Social Mobility 3D: Five Terraces, Persistence and the Stationary Class Distribution and change the parameters while it is running. Nothing is installed, nothing is uploaded, the whole model lives in one tab.

▶ Open Social Mobility 3D: Five Terraces, Persistence and the Stationary Class Distribution simulation