Dynamics of internal migration in Bangladesh: Trends, patterns, determinants, and causes

Introduction Internal migration is essential to understand the population dynamics and the multifaceted relationship between population and development of a nation. In Bangladesh, the study of international migration is more frequent due to its socioeconomic importance and data availability. However, the study of internal migration is less frequent as there lie complexities in measuring internal migration, and data are less available. Thus, this paper aimed to explore the dynamics of internal in Bangladesh. Data and methods We utilized data from the Bangladesh Population and Housing Census 1991-2011. The number of internal migrants was estimated using the United Nations Manual on Methods of Measuring Internal Migration- Manual VI. District-wise lifetime and net internal migration rate were the dependent variables where several socioeconomic variables were used as independent variables. The correlation and the stepwise multiple linear regression analysis were employed. Results Dhaka, Gazipur, Narayanganj, and all the Divisional cities have the highest in-migration rate, whereas the northern and southern districts of Bangladesh have the highest out-migration rate. The regression model showed that activity rate appeared to be the strongest predictor (beta = 0.419, P<0.001) of net migration for 2011, followed by city corporation (beta = 0.275, P<0.01) and poverty rate (beta = -0.246, P<0.01). However, the lifetime internal migration rate was 9.8% in 2011. The pooled model (1991-2011) for lifetime internal migration showed that activity rate (beta = 0.408, P<0.001), population density (beta = 0.386, P<0.001), literacy rate (beta = 0.341, P<0.001), and city corporation (beta = 0.139, P<0.01) were the significant factors of internal migration. Marriage, looking for a job, employment/business, education, and natural calamities were the reasons for internal migration. Discussion and conclusion The destinations of migrants are few developed and urbanized cities which needs particular attention in policy planning. If the current migration trends continue, few cities will have an excessive population, which will increase density and pollution, thereby decreasing living standards. Thus, along with comprehensive urban planning, decentralization of government and private institutions must be ensured. Since the rural to urban migration rate is high, the findings recommend more development and concentration in the rural area. Finally, education, training, and work opportunities for migrants should be safeguarded in the area of origin.