NFtechby Naël Fridhi

Writing

16 pieces on AI, business and the tools worth knowing about.

AIGenAIFundamentals

AI Agents, Explained From Scratch (With Google's ADK)

A chatbot answers. An agent gets things done. A hands-on, jargon-free tour of how AI agents work, using Google's Agent Development Kit — every idea comes with something to click.

·8 min read
BusinessFinanceAnalytics

Your Return on Equity Is Hiding Something

Sales are fine and profit isn't. The DuPont framework splits one number into three, and the three tell you which lever is actually broken.

·5 min read
BusinessPricingEconomics

The Gym Membership Is the Product

Entry fee plus a price per use looks like a way to seem cheap. It's actually one of the most powerful pricing structures there is, and the reason is counter-intuitive.

·5 min read
BusinessFinanceFundamentals

Marginal Cost Is Not Variable Cost

They get used interchangeably and they answer different questions. One tells you what production costs; the other tells you whether to make one more.

·5 min read
BusinessAnalyticsStrategy

Stop Asking Customers What They Want

People are bad at describing their preferences and excellent at revealing them. Conjoint analysis is the technique that exploits the gap — and this post runs one on you.

·5 min read
BusinessAnalyticsStrategy

Why Did It Fail? Probably Not for Any of the Reasons You Listed

Bad strategy, poor execution, not enough money. Three plausible answers that are often all wrong, because the thing that actually caused it was never on the list.

·5 min read
BusinessEconomicsStrategy

Winning the Auction Is the Bad News

When nobody knows what something is worth, the person who wins is usually the person who was most wrong about it. More competition makes this worse, not better.

·5 min read
BusinessEconomicsPricing

Three Auctions, One Surprising Result

English, Vickrey, and sealed first-price auctions feel completely different to run. On average they collect the same amount — and knowing why tells you when they don't.

·5 min read
BusinessPricingAnalytics

Start High and Drift Down, or Just Test It?

Two ways to find out what people will pay. One needs patience and a story; the other needs traffic. Most teams pick the wrong one for their situation.

·5 min read
BusinessPricingStrategy

The Option You Never Meant to Sell

Nobody evaluates a price on its own. They evaluate it against whatever is sitting next to it — which means the shape of your menu is a pricing decision.

·5 min read
BusinessEconomicsFundamentals

The Tale of Two Diminishing Marginals

Diminishing marginal utility and diminishing marginal returns sound like the same idea. They describe opposite sides of the market, and confusing them leads to real mistakes.

·5 min read
AIGenAIFundamentals

Why LLMs Hallucinate (And Why That's Not a Bug)

A plain-English look at why large language models confidently make things up, and what that means for how you should use them.

·2 min read
AIGenAITools

Prompt Engineering in 5 Minutes

The handful of techniques that actually move the needle when you're talking to an AI model — no fluff.

·Video
ToolsAI

Picking Your First AI Tool Without Getting Overwhelmed

There are thousands of AI tools launching every month. Here's a simple filter to cut through the noise.

·1 min read
GenAIFundamentals

Generative AI vs. Traditional ML: What's Actually Different

GenAI and 'regular' machine learning get lumped together constantly. Here's the real distinction, in plain terms.

·1 min read
Tools

I Tried 6 Note-Taking Apps So You Don't Have To

A fast, opinionated walkthrough comparing note apps for people who want to actually find their notes again.

·Video