corpus.blog
41554 blogs · [ { "id": "01a08791-ea44-7243-ad6b-52dcd2a9672c", "title": "Two party systems and the quartile voters", "url": "https://jslandy.com/two-party-systems-quartile-voters", "published_at": "2026-09-06T07:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-247923e3f85d", "title": "A scale invariance property of PCA", "url": "https://jslandy.com/pca-invariant", "published_at": "2026-08-25T07:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-24792462e3e6", "title": "PCA stretch asymptotics", "url": "https://jslandy.com/pca-stretch-asymptotics", "published_at": "2026-08-25T07:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-2479248e83c9", "title": "LTV and the time value of money", "url": "https://jslandy.com/ltv-and-time-value-of-money", "published_at": "2026-05-20T07:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-247924c6f0b4", "title": "PCA slope vs regression slope", "url": "https://jslandy.com/pca-vs-regression-slope", "published_at": "2026-05-16T07:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-2479253b598a", "title": "Allocation with Substitutes", "url": "https://jslandy.com/allocation%20with%20subs", "published_at": "2026-05-05T16:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-247925637b17", "title": "Optimal Elevator Placement", "url": "https://jslandy.com/elevators", "published_at": "2026-03-22T07:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-2479256614e5", "title": "Queueing Theory of Traffic", "url": "https://jslandy.com/traffic-queue", "published_at": "2026-03-14T16:21:00+00:00" }, { "id": "01a08791-ea46-7086-9293-2479256d3bd4", "title": "Static Pricing Theory", "url": "https://jslandy.com/pricing", "published_at": "2026-01-20T17:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-2479257ba912", "title": "The Cost of Allocation Errors", "url": "https://jslandy.com/misallocation", "published_at": "2025-12-19T17:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-2479257def44", "title": "The Wholesale Gamble", "url": "https://jslandy.com/wholesale", "published_at": "2025-11-04T17:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-2479259abb85", "title": "Risk-Adjusted Return on Inventory Buys", "url": "https://jslandy.com/risk-adjusted-return", "published_at": "2025-08-18T16:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-2479259e4d8f", "title": "Optimal Allocation", "url": "https://jslandy.com/allocation", "published_at": "2025-08-04T16:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-2479268372a4", "title": "How Return Rates Affect Margin in E-commerce", "url": "https://jslandy.com/returns", "published_at": "2025-07-21T16:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-247926f64213", "title": "Product Categories Supporting Option Breadth", "url": "https://jslandy.com/econ", "published_at": "2025-07-08T16:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-2479279bd528", "title": "Complex, cannibalization-heavy assortments", "url": "https://jslandy.com/complex", "published_at": "2025-06-16T16:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-247927e0e3d1", "title": "The Newsvendor Model and Apparel", "url": "https://jslandy.com/news", "published_at": "2025-06-02T16:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-247928d4fd22", "title": "Three insights from order quantity theory", "url": "https://jslandy.com/quantity", "published_at": "2025-05-18T16:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-24792923c4e8", "title": "Three lessons from safety stock theory", "url": "https://jslandy.com/safetystock", "published_at": "2025-05-05T16:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-247929d0471d", "title": "Setting colorway count in an apparel product line", "url": "https://jslandy.com/colorways", "published_at": "2025-04-08T16:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-24792a55553a", "title": "Garment Color and Lighting", "url": "https://jslandy.com/color", "published_at": "2025-03-24T16:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-24792b1137ff", "title": "Balancing new and bestsellers in apparel", "url": "https://jslandy.com/newbuy", "published_at": "2025-03-06T17:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-24792b4979af", "title": "Mathematics of parking tickets", "url": "https://jslandy.com/math-of-parking-tickets", "published_at": "2023-12-13T17:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-24792bdc7c4e", "title": "Spaced repetition can allow for infinite recall", "url": "https://jslandy.com/memory%20recall", "published_at": "2022-08-07T07:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-24792c37c53f", "title": "Counting the number of ways to make change for a trillion dollars", "url": "https://jslandy.com/change", "published_at": "2021-11-22T17:24:00+00:00" }, { "id": "01a08791-ea46-7086-9293-24792d26c37b", "title": "Generalized Dollar Cost Averaging", "url": "https://jslandy.com/generalized_dollar_cost_averaging", "published_at": "2021-03-20T07:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-24792de6ad47", "title": "Physics-based proof of the duality theorem for linear programs", "url": "https://jslandy.com/duality", "published_at": "2021-02-14T17:24:00+00:00" }, { "id": "01a08791-ea46-7086-9293-24792e06f7ac", "title": "Pricing dividend stocks", "url": "https://jslandy.com/pricing-dividend-stocks", "published_at": "2020-12-20T08:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-24792e73b862", "title": "Utility engines", "url": "https://jslandy.com/utility-engines", "published_at": "2020-09-13T16:24:00+00:00" }, { "id": "01a08791-ea46-7086-9293-24792f044c19", "title": "2 + 1 = 4, by quinoa", "url": "https://jslandy.com/quinoa%20packing", "published_at": "2020-07-03T07:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-24792f587c97", "title": "Sample pooling to reduce needed disease screening test counts", "url": "https://jslandy.com/pooling", "published_at": "2020-03-29T07:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-24792fb8db7e", "title": "Universal limiting mean return of CPPI investment portfolios", "url": "https://jslandy.com/universal-mean-return-formula-of-the-cppi-investment-strategy", "published_at": "2019-12-10T00:14:00+00:00" }, { "id": "01a08791-ea46-7086-9293-2479307e9467", "title": "Universal drawdown statistics in investing", "url": "https://jslandy.com/universal-drawdown-statistics-in-investing", "published_at": "2019-12-05T23:46:00+00:00" }, { "id": "01a08791-ea46-7086-9293-2479314bb28f", "title": "TimeMarker class for python", "url": "https://jslandy.com/timemarker-class-for-python", "published_at": "2019-09-15T05:31:00+00:00" }, { "id": "01a08791-ea46-7086-9293-247931d52afc", "title": "Compounding benefits of tax protected accounts", "url": "https://jslandy.com/compounding-benefits-of-tax-protected-accounts", "published_at": "2019-06-28T16:51:00+00:00" }, { "id": "01a08791-ea46-7086-9293-247932d17c7f", "title": "Utility functions and immigration", "url": "https://jslandy.com/utility-functions-and-immigration", "published_at": "2019-06-21T16:24:00+00:00" }, { "id": "01a08791-ea46-7086-9293-24793333bc44", "title": "The speed of traffic", "url": "https://jslandy.com/the-speed-of-traffic", "published_at": "2019-06-14T16:21:00+00:00" }, { "id": "01a08791-ea46-7086-9293-247934215d3c", "title": "Linear compression in python: PCA vs unsupervised feature selection", "url": "https://jslandy.com/unsupervised-feature-selection-in-python-with-linselect", "published_at": "2018-08-11T14:30:00+00:00" }, { "id": "01a08791-ea46-7086-9293-2479348757e3", "title": "linselect demo: a tech sector stock analysis", "url": "https://jslandy.com/linselect-demo", "published_at": "2018-05-31T21:17:00+00:00" }, { "id": "01a08791-ea46-7086-9293-2479357f1879", "title": "Integration method to map model scores to conversion rates from example data", "url": "https://jslandy.com/integration-method-to-map-model-scores-to-conversion-rates-from-example-data", "published_at": "2018-03-04T01:53:00+00:00" }, { "id": "01a08791-ea46-7086-9293-2479361f6f97", "title": "Gaussian Processes", "url": "https://jslandy.com/gaussian-processes", "published_at": "2017-11-25T17:53:00+00:00" }, { "id": "01a08791-ea46-7086-9293-247936adbb0c", "title": "Martingales", "url": "https://jslandy.com/martingales", "published_at": "2017-10-20T14:44:00+00:00" }, { "id": "01a08791-ea46-7086-9293-24793771f19c", "title": "Logistic Regression", "url": "https://jslandy.com/logistic-regression", "published_at": "2017-07-30T02:10:00+00:00" }, { "id": "01a08791-ea46-7086-9293-2479384daefe", "title": "Normal Distributions", "url": "https://jslandy.com/normal-distributions", "published_at": "2017-05-14T04:48:00+00:00" }, { "id": "01a08791-ea46-7086-9293-247939103509", "title": "Model AUC depends on test set difficulty", "url": "https://jslandy.com/model-auc-depends-on-test-set-difficulty", "published_at": "2017-03-19T05:36:00+00:00" }, { "id": "01a08791-ea46-7086-9293-24793962fbd2", "title": "Simple python to LaTeX parser", "url": "https://jslandy.com/simple-python-to-latex-parser", "published_at": "2016-11-18T20:59:00+00:00" }, { "id": "01a08791-ea46-7086-9293-247939e23a27", "title": "Deep reinforcement learning, battleship", "url": "https://jslandy.com/battleship", "published_at": "2016-10-15T20:52:00+00:00" }, { "id": "01a08791-ea46-7086-9293-24793a25f1e0", "title": "Hyperparameter sample-size dependence", "url": "https://jslandy.com/model-selection", "published_at": "2016-08-21T07:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-24793b0a11f4", "title": "Bayesian Statistics: MCMC", "url": "https://jslandy.com/metropolis", "published_at": "2016-08-08T01:37:00+00:00" }, { "id": "01a08791-ea46-7086-9293-24793bea2c59", "title": "Linear Regression", "url": "https://jslandy.com/linear-regression", "published_at": "2016-05-29T18:27:00+00:00" }, { "id": "01a08791-ea46-7086-9293-24793caeb07d", "title": "Average queue wait times with random arrivals", "url": "https://jslandy.com/average-queue-wait-times-with-random-arrivals", "published_at": "2016-04-23T16:51:00+00:00" }, { "id": "01a08791-ea46-7086-9293-24793ccee4fd", "title": "Improved Bonferroni correction factors for multiple pairwise comparisons", "url": "https://jslandy.com/bonferroni-correction-for-multiple-pairwise-comparison-tests", "published_at": "2016-04-10T14:58:00+00:00" }, { "id": "01a08791-ea46-7086-9293-24793cf690d2", "title": "Independent component analysis", "url": "https://jslandy.com/independent-component-analysis", "published_at": "2016-02-14T08:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-24793de37569", "title": "Maximum-likelihood asymptotics", "url": "https://jslandy.com/maximum-likelihood-asymptotics", "published_at": "2015-12-30T08:01:00+00:00" }, { "id": "01a08791-ea46-7086-9293-24793e2a049a", "title": "Principal component analysis", "url": "https://jslandy.com/principal-component-analysis", "published_at": "2015-12-06T06:22:00+00:00" }, { "id": "01a08791-ea46-7086-9293-24793eb648f6", "title": "A review of parameter regularization and Bayesian regression", "url": "https://jslandy.com/bayesian-linear-regression", "published_at": "2015-10-11T07:01:00+00:00" }, { "id": "01a08791-ea46-7086-9293-24793f6994d6", "title": "Stochastic geometric series", "url": "https://jslandy.com/stochastic-geometric-series", "published_at": "2015-09-13T13:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-24794048550d", "title": "Leave-one-out cross-validation", "url": "https://jslandy.com/leave-one-out-cross-validation", "published_at": "2015-08-01T23:08:00+00:00" }, { "id": "01a08791-ea46-7086-9293-2479406d1743", "title": "How not to sort by average rating, revisited", "url": "https://jslandy.com/ranking-revisited", "published_at": "2015-07-12T03:30:00+00:00" }, { "id": "01a08791-ea46-7086-9293-247940c229de", "title": "Multivariate Cramer-Rao inequality", "url": "https://jslandy.com/multivariate-cramer-rao-bound", "published_at": "2015-06-20T16:00:00+00:00" }, { "id": "01a08791-ea46-7086-9293-247941a1e075", "title": "Machine Learning Methods: Decision trees and forests", "url": "https://jslandy.com/notes-on-trees", "published_at": "2015-03-13T16:40:00+00:00" }, { "id": "01a08791-ea46-7086-9293-247941b4261a", "title": "Mathematics of measles", "url": "https://jslandy.com/math-of-measles", "published_at": "2015-02-25T21:37:00+00:00" }, { "id": "01a08791-ea46-7086-9293-2479429f0233", "title": "Quick tutorial on MySQL", "url": "https://jslandy.com/quick-tutorial-on-mysql", "published_at": "2015-01-17T00:07:00+00:00" }, { "id": "01a08791-ea46-7086-9293-24794384d337", "title": "Quantifying the NBA Christmas week flop: one in ten thousand?", "url": "https://jslandy.com/an-nba-christmas", "published_at": "2014-12-29T05:55:00+00:00" }, { "id": "01a08791-ea46-7086-9293-247943f1714a", "title": "Machine Learning Methods: Classification without negative examples", "url": "https://jslandy.com/methods-regression-without-negative-examples", "published_at": "2014-12-20T17:58:00+00:00" } ] posts Claim your blog
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2026

Two party systems and the quartile votersoriginal ↗
6 Sept 2026
A scale invariance property of PCAoriginal ↗
25 Aug 2026
PCA stretch asymptoticsoriginal ↗
25 Aug 2026
LTV and the time value of moneyoriginal ↗
20 May 2026
PCA slope vs regression slopeoriginal ↗
16 May 2026
Allocation with Substitutesoriginal ↗
5 May 2026
Optimal Elevator Placementoriginal ↗
22 Mar 2026
Queueing Theory of Trafficoriginal ↗
14 Mar 2026
Static Pricing Theoryoriginal ↗
20 Jan 2026

2025

The Cost of Allocation Errorsoriginal ↗
19 Dec 2025
The Wholesale Gambleoriginal ↗
4 Nov 2025
Risk-Adjusted Return on Inventory Buysoriginal ↗
18 Aug 2025
Optimal Allocationoriginal ↗
4 Aug 2025
How Return Rates Affect Margin in E-commerceoriginal ↗
21 Jul 2025
Product Categories Supporting Option Breadthoriginal ↗
8 Jul 2025
Complex, cannibalization-heavy assortmentsoriginal ↗
16 Jun 2025
The Newsvendor Model and Appareloriginal ↗
2 Jun 2025
Three insights from order quantity theoryoriginal ↗
18 May 2025
Three lessons from safety stock theoryoriginal ↗
5 May 2025
Setting colorway count in an apparel product lineoriginal ↗
8 Apr 2025
Garment Color and Lightingoriginal ↗
24 Mar 2025
Balancing new and bestsellers in appareloriginal ↗
6 Mar 2025

2023

Mathematics of parking ticketsoriginal ↗
13 Dec 2023

2022

Spaced repetition can allow for infinite recalloriginal ↗
7 Aug 2022

2021

Counting the number of ways to make change for a trillion dollarsoriginal ↗
22 Nov 2021
Generalized Dollar Cost Averagingoriginal ↗
20 Mar 2021
Physics-based proof of the duality theorem for linear programsoriginal ↗
14 Feb 2021

2020

Pricing dividend stocksoriginal ↗
20 Dec 2020
Utility enginesoriginal ↗
13 Sept 2020
2 + 1 = 4, by quinoaoriginal ↗
3 Jul 2020
Sample pooling to reduce needed disease screening test countsoriginal ↗
29 Mar 2020

2019

Universal limiting mean return of CPPI investment portfoliosoriginal ↗
10 Dec 2019
Universal drawdown statistics in investingoriginal ↗
5 Dec 2019
TimeMarker class for pythonoriginal ↗
15 Sept 2019
Compounding benefits of tax protected accountsoriginal ↗
28 Jun 2019
Utility functions and immigrationoriginal ↗
21 Jun 2019
The speed of trafficoriginal ↗
14 Jun 2019

2018

Linear compression in python: PCA vs unsupervised feature selectionoriginal ↗
11 Aug 2018
linselect demo: a tech sector stock analysisoriginal ↗
31 May 2018
Integration method to map model scores to conversion rates from example dataoriginal ↗
4 Mar 2018

2017

Gaussian Processesoriginal ↗
25 Nov 2017
Martingalesoriginal ↗
20 Oct 2017
Logistic Regressionoriginal ↗
30 Jul 2017
Normal Distributionsoriginal ↗
14 May 2017
Model AUC depends on test set difficultyoriginal ↗
19 Mar 2017

2016

Simple python to LaTeX parseroriginal ↗
18 Nov 2016
Deep reinforcement learning, battleshiporiginal ↗
15 Oct 2016
Hyperparameter sample-size dependenceoriginal ↗
21 Aug 2016
Bayesian Statistics: MCMCoriginal ↗
8 Aug 2016
Linear Regressionoriginal ↗
29 May 2016
Average queue wait times with random arrivalsoriginal ↗
23 Apr 2016
Improved Bonferroni correction factors for multiple pairwise comparisonsoriginal ↗
10 Apr 2016
Independent component analysisoriginal ↗
14 Feb 2016

2015

Maximum-likelihood asymptoticsoriginal ↗
30 Dec 2015
Principal component analysisoriginal ↗
6 Dec 2015
A review of parameter regularization and Bayesian regressionoriginal ↗
11 Oct 2015
Stochastic geometric seriesoriginal ↗
13 Sept 2015
Leave-one-out cross-validationoriginal ↗
1 Aug 2015
How not to sort by average rating, revisitedoriginal ↗
12 Jul 2015
Multivariate Cramer-Rao inequalityoriginal ↗
20 Jun 2015
Machine Learning Methods: Decision trees and forestsoriginal ↗
13 Mar 2015
Mathematics of measlesoriginal ↗
25 Feb 2015
Quick tutorial on MySQLoriginal ↗
17 Jan 2015

2014

Quantifying the NBA Christmas week flop: one in ten thousand?original ↗
29 Dec 2014
Machine Learning Methods: Classification without negative examplesoriginal ↗
20 Dec 2014