Purpose: This study investigates the impact of economic events, such as recessions, on the classical assumptions that form the basis of economic theory. Exploring the applicability of classical economic theory assumptions by considering real-world deviations during economic events. Methodology/approach: The Research Methodology utilizes successful journal and interval review methods to examine economic events and their impact on classical economic theory. Apply the multiple linear regression test to predict the value of the dependent variable using known independent variables. The confidence interval method was employed to estimate the precision of the statistical parameters. Results/findings: Results and present findings on the deviation from classical assumptions during economic events. This study provides insights into the predictive power of multiple linear regressions in the context of economic instability. Share the estimated values and precision of the statistical parameters using the confidence interval method. Limitations: We acknowledge the limitations related to the generalization of the findings during economic events. Recognize the inherent challenges of applying classical economic assumptions to real-world scenarios. Contribution: Contributes to the development of economic theory by highlighting discrepancies between classical assumptions and the complexities of economic events.

Purpose: This study analyzes the effectiveness of taxpayer compliance, tax audits, and tax collection on tax revenue. Research methodology: This study analyzes data from the period of 2021-2023, which covers financial revenues from various sources. Results: The research findings indicate the significant role of taxpayer compliance, tax audits, and tax collection in enhancing tax revenue. Limitations: The limitations of this research are as follows: (1) the variables used are limited to three, namely taxpayer compliance, tax inspection, and tax collection; (2) this study is still in the form of a narrative; and (3) this research only utilizes a literature review as the method. Contribution: This study is expected to provide readers with knowledge regarding the effectiveness of taxpayer compliance, tax audits, and tax collection on tax revenue.

Purpose: This study aims to explore the influence of price perception, brand image, and promotion on purchasing decisions for Belikopi products at Merr Pandugo Surabaya. Methodology/approach: The method used in this research is a quantitative research design paradigm with an emphasis on testing research variables using an approach through surveys of respondents who have experienced Belikopi products. Data were analyzed using multiple linear regression techniques and Determination Coefficient Analysis (R2) using the statistical software product version 25, involving 85 respondents who answered the questionnaires on a Likert scale. Results/findings: In testing the validity of variable dimensions involving 17 items, consisting of price perception, brand image, and promotion variables, on purchasing decisions, the results were proven to be valid because the Rcount value was greater than Rtable. In the simultaneous test or F test, the calculated F value is 51.894 > 2.72, with a significance value of 0.000 < 0.05; therefore, Ha is accepted and Ho is rejected. Thus, it can be concluded that together price perception, brand image and promotion have a significant influence on purchasing decisions. Limitations: This research only focused on Merr Pandugo Surabaya, and the findings may not be generalizable to other locations or contexts. In addition, external factors, such as economic conditions and cultural influences, have not been explored in depth and may influence consumer behavior. Contribution: This study contributes to the existing literature on consumer behavior and marketing by providing a detailed analysis of the factors that influence purchasing decisions for belikopi products in certain locations.