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In fields such as economy, politics, and biology, the observation data points in the time series are often independently obtained (i.e., Repeated Cross-Sectional (RCS) data). RCS data showed that traditional methods for parameter estimation in differential equations, such as using mean values of RCS data over time, Gaussian Process-based trajectory generation, and Bayesian-based methods, have limitations in estimating the shape of parameter distributions, leading to a significant loss of data information. To address this issue, this study proposes a novel method called Estimation of Parameter Distribution (EPD) that provides accurate distribution of parameters without loss of data information. EPD operates in three main steps: generating synthetic time trajectories by randomly selecting observed values at each time point, estimating parameters of a differential equation that minimizes the discrepancy between these trajectories and the true solution of the equation, and selecting the parameters depending on the scale of discrepancy. We then evaluated the performance of EPD across several models, including exponential growth, logistic population models, and target cell-limited models with delayed virus production, thereby demonstrating the ability of the proposed method in capturing the shape of parameter distributions. Furthermore, we applied EPD to real-world datasets, capturing various shapes of parameter distributions over a normal distribution. These results address the heterogeneity within systems, marking a substantial progression in accurately modeling systems using RCS data. Therefore, EPD marks a significant advancement in accurately modeling systems with RCS data, realizing a deeper understanding of system dynamics and parameter variability.<\/jats:p>","DOI":"10.1371\/journal.pcbi.1012696","type":"journal-article","created":{"date-parts":[[2024,12,23]],"date-time":"2024-12-23T13:45:39Z","timestamp":1734961539000},"page":"e1012696","update-policy":"https:\/\/doi.org\/10.1371\/journal.pcbi.corrections_policy","source":"Crossref","is-referenced-by-count":0,"title":["Estimating the distribution of parameters in differential equations with repeated cross-sectional data"],"prefix":"10.1371","volume":"20","author":[{"given":"Hyeontae","family":"Jo","sequence":"first","affiliation":[]},{"given":"Sung Woong","family":"Cho","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3678-2687","authenticated-orcid":true,"given":"Hyung Ju","family":"Hwang","sequence":"additional","affiliation":[]}],"member":"340","published-online":{"date-parts":[[2024,12,23]]},"reference":[{"issue":"2","key":"pcbi.1012696.ref001","doi-asserted-by":"crossref","first-page":"182","DOI":"10.1093\/pan\/mpl001","article-title":"Random coefficient models for time-series\u2014cross-section data: Monte Carlo experiments","volume":"15","author":"N Beck","year":"2007","journal-title":"Political Analysis"},{"key":"pcbi.1012696.ref002","doi-asserted-by":"crossref","first-page":"331","DOI":"10.1146\/annurev-polisci-071510-103222","article-title":"Modeling dynamics in time-series\u2013cross-section political economy data","volume":"14","author":"N Beck","year":"2011","journal-title":"Annual review of political science"},{"key":"pcbi.1012696.ref003","first-page":"4246","volume-title":"Encyclopedia of gerontology and population aging","author":"X Pan","year":"2022"},{"key":"pcbi.1012696.ref004","unstructured":"Stevens GWJM, Van Dorsselaer S, Boer M, De Roos S, Duinhof E, Ter Bogt T, et al. 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