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This study aims to provide insights into management accounting changes (MACs) and potential roles of big data analytics (BDA) in accelerating the MACs in an Indonesian public hospital as a response towards the adoption of the diagnosis-related groups (DRG)-based payment system.

A mixed-method approach was used to collect and analyse data from a referral public hospital in Indonesia. First, a BDA simulation was carried out to reveal its usefulness in predicting and evaluating patient costs, and finally improving the cost recovery rate (CRR) of each DRG case. This part formulated and tested the mathematical models that predict patient cost, the CRR and determinants (length of stay/LOS, severity/SEV, patient age/AGE and gender/SEX). For this purpose, data of the top ten inpatient cases of 2018 were collected and analysed. Second, semi-structured interviews with senior staff and doctors were carried out to understand cost control strategies implemented in the hospital and the management and doctors’ perceptions regarding the application of tested mathematical models for cost control. Old institutional economics and new institutional sociology were used to gain insight about how and why management accounting practices changed in the hospital.

The findings show that the absence of detailed per-case/patient cost information has not only hindered further evolvement of MACs but also stimulate tensions between managerial and medical worlds in the studied Indonesian public hospital. The simulation of BDA in this study was not only discovering the determinants of case cost recovery but also enabling the prediction of CRR of patients immediately after admission. The application of BDA and casemix accounting in the hospital will potentially become catalysts of discussion and mutual learning between managerial and medical staff in controlling patient costs.

This paper provides a more comprehensive picture of the potential roles of BDA in cost control practices. The study assesses the feasibility of BDA application in the hospital and evaluates the potential roles and acceptance of BDA application by both management and doctors.

This paper aims to understand why an expected enhanced role of accounting in Indonesian public hospitals has not occurred, although serial organizational changes and reform of hospital payment systems have taken place.

This study adopts a multiple case study research approach. It was carried out in two Indonesian public hospitals. Interviews were the main tool used for collecting data. The primary interviewees were the top managers, accountants and senior physicians in the hospitals surveyed.

Insights from the interviews revealed that the owners’ traditional role of funding deficits plus the conventional mindsets of managements and physicians who are only interested in health outcomes have hindered the infiltration of economic and accounting logic into the management of these two public hospitals. Consequently, the expected accounting innovations, i.e. an enhanced role of accounting in the hospitals’ daily activities did not emerge.

This case study is not a longitudinal study and the interviewees, particularly senior physicians, were selected based on their availability and willingness to participate in the interviews. Thus, the findings should be treated with caution.

An enhanced role of accounting and other accounting innovations would indicate that the hospitals are responding as expected to the institutional and financial reforms.

Contingency theory and institutional theory have been used together in this study which aims to not only discuss the reasons for accounting changes occurring or not occurring, but also to understand the motivations behind the accounting changes or lack of change. Thus, a more comprehensive understanding of accounting innovations is expected.