SG Talk

there is no point to have a policy that cannot work properly.

PAP can build more flats but the selection process is like buying a lottery.

It's a ballot. Not secondary schools selection

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Summary & Conclusion 

A game theory analysis of HDB’s SBF highlights the strategic interactions between policymakers and buyers. If HDB restricts selections, some flats remain unsold while buyers face uncertainty. Expanding selections improves fairness but may cause over-demand for prime units. An optimal policy balances efficiency and fairness—allowing more choices with prioritization mechanisms (e.g., weighted ballots). This approach maximizes housing allocation while minimizing excess demand. Ultimately, HDB should refine selection rules to enhance market stability and buyer satisfaction, ensuring equitable housing access while preventing systemic inefficiencies.