Using a floating-point number for money is a classic bug, but in a trading system it does not just round a penny wrong: it silently mis-sizes a live position. Here is why, and why a Money type is not the fix you think it is.
A series mining the PhD thesis on London and UK office buildings (Azhari, 2025). Key takeaway. In a multi-let office the organisation that pays for the boiler is rarely the one that benefits from replacing it, so the split incentive shapes energy outcomes more than any building characteristic.
An introduction to my book, "Building a Production Quant Trading System", a practitioner's guide to the unglamorous 90% of systematic trading: why I wrote it, what to expect, and what not to expect.
A series mining the PhD thesis on London and UK office buildings (Azhari, 2025). Key takeaway. Height above six storeys, post-1980 construction and electrified heating leave the clearest energy signature, but each shifts median EUI by no more than a fifth on its own.
A series mining the PhD thesis on London and UK office buildings (Azhari, 2025). Key takeaway. Before you can measure energy across thousands of offices you must decide what counts as an office. The 3DStock model joins seven public datasets into one geospatial picture.
A series mining the PhD thesis on London and UK office buildings (Azhari, 2025). Key takeaway. A linear regression across the Greater London office stock explains just 18 per cent of electricity EUI and 4 per cent of gas EUI from building characteristics alone.
A series mining the PhD thesis on London and UK office buildings (Azhari, 2025). Key takeaway. A statistical analysis of 2,654 Greater London offices finds no significant relationship between EPC band and measured energy use, which is uncomfortable for MEES, ESOS and due diligence.