ZhiZhi Gewu

AUC, KS, Precision, and Recall: A Risk Analyst’s Guide

As analysts in the risk management industry, we live and breathe acronyms like AUC (Area Under the Curve) and KS (Kolmogorov-Smirnov).

Dec 20 • KY John

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It’s Not the Chaos, It’s the Expectation: A Framework for Deconstructing Anxiety

Recently, I’ve spent time reflecting on the problem of anxiety.

Dec 13 • KY John

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November 2025

The Art of Problem Solving: Defining the Gap and Trusting the Process

Do you have friends who seem naturally better at problem-solving?

Nov 23 • KY John

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October 2025

My Singapore Property Purchase Journey (Resale Condo Edition)

A Data-Driven, Step-by-Step Guide to Navigating the Singapore Resale Condo Journey — from Budgeting and Valuation to Negotiation and Completion

Oct 25 • KY John

Viewing Loan Core as a State Machine

How computational theory reveals the hidden order behind lending systems.

Oct 19 • KY John

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Can Publication Data Predict Technology Breakthroughs? Analyzing 500+ Years of Innovation

How Ideas Appear in Print Before They Transform the World

Oct 12 • KY John

From Domestication to AI: What Each General Purpose Technology GPT Unlocked—and How to Use the Lessons

Lessons from past waves for the age of AI

Oct 4 • KY John

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September 2025

Lease Decay

In Singapore's property market, properties are classified into two categories: leasehold and freehold.

Sep 7 • KY John

August 2025

One Model to Rule Them All? Finding the Cracks in Your Global Credit Model

There's an ongoing debate about whether multiple specialized models or a single global model is better for credit risk modeling.

Aug 26 • KY John

5 Reviews at 99% vs. 1000 Reviews at 90%: Which Seller is Better?

Motivation

Aug 10 • KY John

My Incomplete Mental Models on Thinking About A Business

Countless mental models exist for dissecting a business, but theory is cheap.

Aug 3 • KY John

July 2025

The Trap of Belief: Why We Get Stuck in Our Ways and How Our Brains Resist Reality

Have you ever wondered why some people—or even yourself—can't seem to change their minds, no matter how much evidence is presented?

Jul 27 • KY John