User:7804j

I am the main founder and president of the Open Knowledge Association (OKA), a non-profit granting stipends to full-time Wikipedia translators. The articles we created are listed here. The work I do on Wikipedia and for OKA is during my free-time only, without any link to my full-time activity or to my employer.

My philosophy for life is Effective altruism. I fix what I find when browsing Wikipedia and try to contribute on pages where I feel that it would maximize my Social return on investment. In particular, I tend to focus on the fields of statistics, game theory, computer science and economics. I spend most of my time on the lead section of articles, on simplifying definitions and clarifying the differences between similar terms and topics.

Personal contributions

I keep here a list of my main Wikipedia contributions (outside of the work on OKA), mostly to keep a personal history but also for transparency. Note that I am not an expert on any of those topics, but that I only make changes when I have reached a high level of confidence in the accuracy of what I wrote.

Law

Created:

Added infobox, standardized format and clarified names: Swiss nationality law, Federal Act on Banks and Savings Banks

Public policy

Created:

Government institutions

Created:

Added infobox, standardized format and clarified names:Swiss Federal Institute of Intellectual Property, Federal Patent Court (Switzerland)

Updated organigrams: Federal administration of Switzerland, Federal Department of Justice and Police, Federal Department of Home Affairs, Federal Department of Defence, Civil Protection and Sport, Federal Department of Finance

Statistics and Mathematics

Markov chain, Markov process, Memorylessness, Examples of Markov Chains: clarified the definitions and relationships between the terms; rewrote most of the lead section, merged Markov Chain and Markov Process, restructured the whole article of Markov chain.
Cohort study, longitudinal study, panel study, cohort (statistics), panel data, longitudinal data: clarified the definitions and relationship between the terms (incl. page redirections and significant changes on the lead section).
Centrality, Closeness centrality, Eigenvector centrality, Katz centrality, Closeness centrality, Random walk closeness centrality: clarified the definitions and relationship between the terms (incl. page redirections, creation of new articles and significant changes on the lead section).
Unit root, Trend stationary, KPSS test: entirely rewrote or made significant changes to the lead section.
Autocorrelation and Serial dependence: merged the two pages.
Stationary process, Unit root test, Moving-average model, Autoregressive model, Dickey–Fuller test, Correlation and dependence, Association (statistics), Rank correlation, Ordinal association, Augmented Dickey–Fuller test, Breusch–Godfrey test, Autoregressive integrated moving average, Exponential smoothing, Ljung–Box test, Durbin–Watson statistic : less important changes to lead sections to help distinguish between the terms and clarify definitions
Kendall rank correlation coefficient and Spearman's rank correlation coefficient: large change to the lead to help understand and distinguish between the two coefficients.
Simple matching coefficient and Jaccard index: wrote the section distinguishing between the two measures.
Silhouette (clustering): large addition in lead section to include interpretation of the measure
Roulette (curve): Added trochoids to the list, and created the page category: Roulettes.

Computer science

CAP theorem, PACELC theorem: entirely rewrote the articles, in particular the lead section.
Online analytical processing and Online transaction processing: clarified the difference between the two terms in the lead.
Cloudera Impala, Interpolation search, Imperative programming, Kruskal's algorithm, Minimum spanning tree, Turing machine, Data mart, Structure mining, Cloud computing, Association rule learning, Column-Oriented DBMS: changes to lead or clarifications of some aspects.
Edit distance and Damerau–Levenshtein distance: clarified the differences between the various types of edit distance, standardized and simplified the leads
Elbow method (clustering): created the page
NoSQL: restructured the section on "Types and examples" of databases
Polkadot: rewrote/restructured most of the page

Game Theory

Cooperative game theory, Non-cooperative game theory (and the relevant section of Game theory): entirely redefined the terms and rewrote the lead section.
Bayesian game, Complete information, Perfect information, Strategyproofness, Incentive compatibility, Revelation principle, Prospect Theory: important changes or complete rewrite of the lead section. Wrote the "examples section" of Bayesian game.
Vickrey–Clarke–Groves auction: wrote the "intuitive description" section and clarified the lead section.
Superrationality, Homo economicus, Homo reciprocans: important changes to the lead section or to the definition of the terms.

Economics

Double marginalization: created the page
Risk parity: clarification of definition in lead section.
Zero lower bound: Added root cause and solution paragraphs in lead section
Harmonic mean: Clarified and rewrote application in finance; restructured examples section.
Auction ‎and Auction theory: diverse changes to improve consistency.
English auction: added the "Japanese auction" section.
No-reserve auction: created the page.
The Market for Lemons
List of Nobel Memorial Prize laureates in Economics: addition of the "Key contributions" column

Finance

Rachev ratio, Wrong Way Risk: created and wrote the page
Exposure at default, Credit risk, Credit Exposure, Probability of default, Potential future exposure, Loss given default: clarified definitions and relationship between terms (incl. page redirections, creation of new articles and significant changes on the lead section).
Tracking error and Active risk: merged the two articles.
Omega ratio, Alpha (finance): clarifications and small changes for consistency between the different ratios.
Information ratio, Sharpe ratio: Rewrote lead and clarified structure of pages
Cross-listing: rewrote lead (and adapted depositary receipt accordingly)

Accounting

Net Income and Net Profit, Gross Income, Gross profit and Gross margin: merged and restructured the pages
Quick ratio, Return on Capital: restructured lead and clarified definition
Net Operating Assets: merged invested capital into the page, and rewrote the page
Non-financial asset: created stub

Operations

Overall equipment effectiveness: rewrote the lead section and restructured the page
Vendor-managed inventory, Silver–Meal heuristic: minor changes to lead or clarifications of some aspects.
Kraljic matrix: created and wrote the page and graph.
Hayes-Wheelwright matrix: rewrote lead and added graph

Psychology

Explicit memory, Declarative memory, Implicit memory, Procedural memory, Autobiographical memory: clarified the definitions and relationship between the terms, incl. the merger of declarative memory into explicit memory.
Miller's law, Peak–end rule, Duration neglect, Base rate fallacy: minor changes to lead, clarification of relationship between the terms.
Halo effect: rewrote the lead section.
Proportionality Bias: created stub
List of cognitive biases: added the column "Type" and categorized the biases accordingly

Medicine

Charlson Comorbidity Index (CCI), Comorbidity–polypharmacy score, Elixhauser Comorbidity Index: created the pages
Drug tolerance, Tolerability, Reverse tolerance, Desensitization (medicine) and Tachyphylaxis: re-wrote large sections of the lead and clarified relationship between terms

Other

Created:

Created stubs from French

Other: Mausoleum of the First Qin Emperor (created the "discovery" section, translated from French); Sutor, ne ultra crepidam (added references to Ultracrepidarianism); Restructuring of pages, including Notarial act

As well as minor changes to a variety of other articles.