"What are the differences among the research approaches (and thinking styles) that guide the predominant kinds of studies done in operations research, marketing, finance, and/or organizational behavior?"

To understand the differences among research approaches in operations research, marketing, finance, and organizational behavior, we can consider the different thinking styles and methodologies that guide these studies.

1. Operations Research (OR): Operations research focuses on solving complex problems using mathematical modeling and optimization techniques. The thinking style in OR involves a systematic and analytical approach to decision-making. Researchers in OR often use quantitative analysis and mathematical modeling to understand and optimize processes, such as supply chain management, logistics, scheduling, and resource allocation.

2. Marketing Research: Marketing research is concerned with understanding consumer behavior, market trends, and developing effective marketing strategies. The thinking style in marketing research is often qualitative and exploratory. Researchers in this field use techniques such as surveys, interviews, focus groups, and observation to gather data. They analyze consumer preferences, attitudes, and motivations to develop insights for marketing decision-making.

3. Financial Research: Financial research focuses on understanding the behavior of financial markets, investments, and corporate finance. The thinking style in finance research is predominantly quantitative and analytical. Researchers in finance often use statistical analysis and econometric models to study relationships between variables, assess risk, and evaluate investment opportunities.

4. Organizational Behavior Research: Organizational behavior research investigates individual and group behavior within organizations to understand factors that impact performance, job satisfaction, and organizational effectiveness. The thinking style in this field is often a combination of qualitative and quantitative approaches. Researchers use surveys, interviews, and experiments to gather data on individual and group behaviors. They analyze relationships between variables, such as leadership styles, organizational culture, and employee motivation.

It's important to note that these descriptions are generalizations, and there may be overlap or variations within each field depending on specific research topics or methodologies employed. Researchers within each field may also employ interdisciplinary approaches to gain a more comprehensive understanding of the subject matter.