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Bayesian Gaussian Processes. Or: How I Learned to Stop Worrying and Love Nonlinear Social Science

Project description

Understanding complex nonlinear phenomena in the social sciences

In cross-sectional research, variables like the inclination to share fake news are closely linked with human perception, creating intricate patterns that defy linear analyses. Longitudinal studies, tracking the nonstationary nature of temporal social processes, further compound the issue. Conventional methods do not capture this complexity. The ERC-funded NONLINEARSCIENCE project, a pioneering initiative, leverages Bayesian Gaussian processes to address this. The project proposes flexible nonparametric methodologies, allowing researchers to grasp complex nonlinear shapes, integrate prior knowledge and test theories. New user-friendly software will ensure broad accessibility, with tailored extensions for diverse data types. NONLINEARSCIENCE will empower scientists to comprehend intricate nonlinear mechanisms, track temporal evolution and make accurate predictions in the dynamic landscape of social science.

Objective

Nonlinearity is ubiquitous in the social sciences. In cross-sectional research, nonlinearity naturally follows from the fact that variables often depend on human perception. The tendency to share fake news, for example, depends in a complex nonlinear manner on peoples’ personality and political preferences. In longitudinal research, nonlinearity follows from the fact that temporal social processes are nonstationary by nature. For instance, stressful life events (e.g. unemployment, pandemic) have a complex nonlinear impact on well-being over time. To study these nonlinear phenomena, much more data are needed than in linear analyses. Therefore, researchers increasingly rely on technological innovations to collect rich data, such as panel data via online surveys, experience sampling data via mobile apps, or temporal social network data using digital communication (e.g. email). In addition, prior information (e.g. from experts) is often available to inform us about plausible nonlinear shapes. A crucial problem is however that statistical approaches for learning nonlinearity still heavily rely on old-fashioned techniques which can only model simple (curvilinear) effects and are unable to include external prior information. Our understanding about nonlinear phenomena therefore remains limited. This project aims to resolve these shortcomings by developing cutting-edge methods for nonlinear social science using Bayesian Gaussian processes. With this nonparametric methodology, we can learn complex nonlinear shapes, add prior knowledge, and test nonlinear theories. Implementation in user-friendly software will ensure general utilization. Tailor-made extensions will be developed for cross-sectional data, panel data, experience sampling data, and temporal social network data. After this project, we will be able to truly understand complex nonlinear mechanisms, to learn how these unfold over time, and to make accurate predictions (e.g. of well-being after life events).

Fields of science (EuroSciVoc)

Keywords

Programme(s)

Topic(s)

Funding Scheme

HORIZON-ERC - HORIZON ERC Grants

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Call for proposal

(opens in new window) ERC-2022-COG

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Host institution

TILBURG UNIVERSITY- UNIVERSITEIT VAN TILBURG
Net EU contribution
€ 1 999 555,00
Address
WARANDELAAN 2
5037 AB Tilburg
Netherlands
Activity type
Higher or Secondary Education Establishments
Links
Total cost
€ 1 999 555,00

Beneficiaries (1)