Glossary · Business Analytics
Unit Economics
also: CAC · LTV · LTV to CAC ratio · payback period
Definition
Unit economics is the financial performance of a single customer (or transaction) decomposed into acquisition cost, gross margin per period, retention, and payback period. Cohort-level unit economics, computed per acquisition cohort rather than rolled up, is the only form that survives growth-driven distortion.
Unit economics answers: does each customer generate more gross profit than they cost to acquire, before the business runs out of capital? The canonical decomposition is CAC (customer acquisition cost), gross margin per period, retention curve, and discount rate, yielding LTV and payback period. Aggregate LTV/CAC is almost always misleading, new cohorts and mature cohorts behave differently. The honest form is cohort unit economics: plot each cohort's cumulative gross profit vs CAC.
Essays on this concept
- Business Analytics
The Analytics Engineering Manifesto: Why dbt Changed the Data Team Operating Model Forever
Before dbt, analysts wrote SQL that nobody reviewed, nobody tested, and nobody documented. The tool was simple, SQL templating with version control. The impact was structural: it created an entirely new discipline.
- Behavioral Economics
Choice Architecture at Scale: How Default Options Drive $2.3B in Incremental E-commerce Revenue
An empirical examination of default effects in digital commerce, from Thaler and Sunstein's nudge theory to the precise mechanics of how pre-selected options generate billions in revenue most consumers never consciously chose to spend.
- Marketing Engineering
Customer Lifetime Value as a Control Variable: Re-Engineering Bid Strategies for Profitable Growth
Your bid algorithm optimizes for conversions. But a $50 customer who churns in month one and a $50 customer who stays for three years look identical at the point of acquisition. CLV-based bidding fixes the denominator.
- Business Analytics
Cohort-Based Unit Economics: Why Monthly Snapshots Lie and How to Build a True P&L by Acquisition Cohort
Your company's monthly revenue is growing 20% year-over-year. Your unit economics are deteriorating. Both statements are true simultaneously, and you'll never see the second one in an aggregate P&L.
- Marketing Strategy
The Compounding Advantage of Content Moats: Modeling SEO as a Capital Investment with Depreciation Curves
A single well-written article generates traffic for years. That makes content a capital asset, not an operating expense, and like any capital asset, it depreciates. The companies that model this correctly build content moats that compound. The rest produce content that decays.
- Business Analytics
From Dashboards to Decision Systems: Embedding Prescriptive Analytics Into Operational Workflows
Your company has 47 dashboards. How many of them changed a decision last week? Dashboards describe what happened. Decision systems prescribe what to do next, and the gap between these two is where most analytics ROI evaporates.
- Marketing Strategy
From Acquisition to Monetization: A Full-Funnel Simulation Model for Scenario Planning in Marketplace Businesses
Marketplace unit economics are non-linear. A 2% change in take rate doesn't produce a 2% change in revenue, it cascades through supply-side behavior, demand elasticity, and liquidity dynamics. Spreadsheets can't capture this. Monte Carlo simulations can.
- Marketing Engineering
The Hidden Cost of Optimization: How Over-Fitted Algorithms Destroy Long-Term Brand Equity
Your bidding algorithm gets better every quarter. Your brand gets weaker every year. This is not a coincidence, it's Goodhart's Law applied to marketing, and the compounding damage is invisible until it's too late.
- Behavioral Economics
Hyperbolic Discounting and Subscription Fatigue: A Quantitative Framework for Churn Prediction
How time-inconsistent preferences explain why subscribers cancel, and a mathematical framework that predicts churn windows before they open.
- Digital Economics
The Micro-Economics of API Pricing: Marginal Cost, Value Capture, and Developer Elasticity
An API call costs fractions of a cent to serve but can generate thousands in downstream value. The gap between marginal cost and captured value is where the entire API economy lives, and most companies price this gap wrong.
- E-commerce ML
Real-Time Fraud Detection at Checkout: A Streaming ML Pipeline Architecture with Sub-100ms Latency
You have 100 milliseconds to decide whether a transaction is fraudulent. In that window, you need to compute 200+ features from streaming data, run inference on a model trained on 1:1000 class imbalance, and return a score that balances revenue loss against customer friction.
- Marketing Strategy
The Strategy-Execution Gap in Growth Teams: Why OKRs Fail and How Input Metrics Fix Them
Your Q1 OKR was 'increase activation rate by 15%.' It's March and you're at 3%. The problem isn't execution, it's that activation rate is an output. You can't execute on an output. Input metrics bridge the gap between strategy and daily action.
- Behavioral Economics
Sunk Cost Fallacy in Product Adoption: Why Users Who Customize Retain 4x Longer
Economists call it irrational. Product managers call it retention. The sunk cost fallacy, when properly channeled through customization and effort investment, becomes the most reliable predictor of long-term user engagement.
- Business Analytics
Survival Analysis for Subscription Businesses: Cox Proportional Hazards vs. Deep Recurrent Models
Binary churn models answer the wrong question. 'Will this user churn?' matters less than 'When will this user churn?' Survival analysis models the timing - and the when determines whether intervention is profitable.
- Digital Economics
Winner-Take-Most vs. Multi-Homing: An Empirical Analysis of Market Concentration in Vertical SaaS
The 'winner-take-all' narrative dominates SaaS strategy. But empirical data across 20+ vertical categories tells a different story: most B2B software markets stabilize with 3-5 serious players, and switching costs are falling faster than incumbents realize.
- Digital Economics
The Economics of Zero Marginal Cost Bundling: When Adding Products Decreases Revenue
In digital markets, the marginal cost of adding one more product to a bundle is zero. Conventional wisdom says bundle everything. The data says the opposite, past a threshold, each addition dilutes the bundle's perceived value and total willingness to pay drops.
- SEO
Backlink Quality Scoring Beyond DR and UR
A multi-dimensional framework for scoring backlinks beyond Ahrefs DR and Moz DA, drawing on the graph-theoretic literature, Google spam policy, and operating case studies.
- Business Analytics
Cohort Analysis at the Action-Set Level (Not User-Level)
Sign-up-month cohorts confuse arrival with behavior. Action-set cohorts predict retention earlier and more honestly, at the cost of an event taxonomy, materialized views, and resolved identity discipline.
- SEO
The Click-Through-Rate Decay Curve and SERP-Position Economics
How the empirical CTR-by-position curve has flattened at the top of the SERP, what the unit economics of moving from position 6 to 3 versus 3 to 1 actually look like, and where the diminishing returns sit in practice.
- Pricing Strategy
Discount Engineering: When Promotions Destroy LTV
Discounts can acquire incremental customers or destroy lifetime value, and the difference between the two outcomes is more about who the discount reaches than how deep it goes. A framework for telling them apart.
- Business Analytics
The Death of Last-Click in Mobile-App Attribution
Why SKAdNetwork 4 postback loss, IDFA opt-out rates, and the Apple privacy threshold have ended last-click attribution for mobile apps, and how incrementality testing has become the operational ground truth.
- Business Analytics
Mobile App SDK Overhead vs. Telemetry Value
Most mobile apps over-instrument. The cost shows up in binary size, cold start, battery, and privacy permissions. This essay maps the SDK trade-off honestly, with the question of what to drop and what to keep.
- Behavioral Economics
The Mood Index: Reading Affect, Compulsivity, and Identity Signals in Cosmetics E-commerce Baskets
Cosmetics is the only consumer e-commerce category where four clinical psychology mechanisms operate at unusually high intensity at the same time. Each one leaves a distinct fingerprint in checkout data. Standard segmentation models miss most of it.
- Business Analytics
North-Star Metric Construction and Revision Discipline
Constructing a north-star metric that informs decisions, the triggers that require revision, and the political economy of changing a metric the organization has built itself around. Goodhart, Campbell, surrogation.
- Pricing Strategy
Pricing Pages as Information Architecture
The pricing page is the highest-leverage UX surface in most SaaS products. Treat it as information architecture, and the conversion math reorganizes around plan structure, comparison cognition, and CTA placement.
- Business Analytics
Server-Side Tagging Beyond Compliance: The Operational Case
Privacy compliance is the entry point for server-side tagging. The operational case is broader: latency, ad-blocker resilience, data quality, and the cost model of running an event router at production scale.
- Pricing Strategy
Subscription Tier Design and Migration Paths
Each tier is a contract about value, price, and friction. Bad ladders produce churn at the bottom, friction at the top, and trapped value in the middle. The right design takes more rigor than the three-tier default.
Related concepts
Authoritative references