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Related Experiment Video

Updated: May 27, 2026

Evaluation of a Smartphone-based Human Activity Recognition System in a Daily Living Environment

Evaluation of a Smartphone-based Human Activity Recognition System in a Daily Living Environment

Published on: December 11, 2015

Mobility ratios and association in mobility tables.

Population Studies

|November 19, 2011

Summary

Sociologists struggled to compare occupational mobility data due to differing category sizes and dissimilar generational occupational distributions. They needed a method to make historical occupational structures comparable.

Area of Science:

Sociology
Social Stratification
Demography

Background:

Researchers in the late 1940s encountered challenges analyzing intergenerational occupational mobility data.
Key figures like Natalie Rogoff, David Glass, and Gosta Carlsson faced similar issues across different countries.

Purpose of the Study:

To address the problem of comparing occupational mobility data when occupational categories vary significantly in size.
To develop a technique for making occupational structures from different time periods (generations) comparable.

Main Methods:

Converting frequency matrices of father's occupation by respondent's occupation into inflow and outflow percentages.
Identifying the methodological challenge of comparing these percentages across dissimilar occupational categories.

Related Experiment Videos

Last Updated: May 27, 2026

Evaluation of a Smartphone-based Human Activity Recognition System in a Daily Living Environment

Evaluation of a Smartphone-based Human Activity Recognition System in a Daily Living Environment

Published on: December 11, 2015

Main Results:

The core problem stemmed from the unequal sizes of occupational categories, hindering direct comparison of mobility patterns.
Dissimilar marginal distributions between father and respondent generations, due to factors like differential fertility and occupational shifts, complicated analysis.

Conclusions:

A standardized method was needed to adjust for differing occupational category sizes and generational occupational structure disparities.
The goal was to enable meaningful comparisons of social mobility across different populations and time periods.