A reference library explaining how ranking systems work — across sports, education, finance, technology, and algorithms.https://rankstash.com/https://rankstash.com/technology/amazon-best-seller-ranking/https://rankstash.com/technology/amazon-best-seller-ranking/How Amazon's Best Seller Rank works: recent sales velocity within categories, hourly updates, sales history decay, and how sellers interpret BSR.https://rankstash.com/technology/app-store-ranking-algorithm/https://rankstash.com/technology/app-store-ranking-algorithm/How the Apple App Store ranks apps: download velocity, ratings and reviews, metadata relevance, engagement signals, editorial featuring, and known limitations.https://rankstash.com/education/arwu-shanghai-ranking/https://rankstash.com/education/arwu-shanghai-ranking/How the Academic Ranking of World Universities works: Nobel prizes, highly cited researchers, Nature and Science papers, fixed weights, and no surveys.https://rankstash.com/sports/atp-tennis-rankings/https://rankstash.com/sports/atp-tennis-rankings/How the ATP tennis rankings work: the 52-week rolling points system, tournament tier weighting, best-results counting, update frequency, and limitations.https://rankstash.com/media/billboard-hot-100-methodology/https://rankstash.com/media/billboard-hot-100-methodology/How the Billboard Hot 100 ranks songs: the streaming/sales/airplay blend, Luminate tracking week, recurrent rules, and criticisms of the multi-metric formula.https://rankstash.com/algorithms/borda-count-ranking-method/https://rankstash.com/algorithms/borda-count-ranking-method/How the Borda count works: points per rank position summed across ballots, consensus-seeking behavior, vulnerability to strategic voting, and where it's used.https://rankstash.com/algorithms/bradley-terry-model/https://rankstash.com/algorithms/bradley-terry-model/How the Bradley–Terry model works: win probabilities from strength ratios, maximum-likelihood fitting, and its role from chess ratings to AI preference ranking.https://rankstash.com/sports/college-football-playoff-ranking-system/https://rankstash.com/sports/college-football-playoff-ranking-system/How the College Football Playoff rankings work: the selection committee, evaluation criteria, weekly rankings, the 12-team format, and criticisms.https://rankstash.com/sports/colley-matrix/https://rankstash.com/sports/colley-matrix/How the Colley Matrix works: a win-loss-only linear system, strength of schedule emerging from the math, its BCS role, and known limitations.https://rankstash.com/algorithms/condorcet-voting-method/https://rankstash.com/algorithms/condorcet-voting-method/How Condorcet methods rank candidates: head-to-head majority duels from ranked ballots, the Condorcet paradox and cycles, and resolution rules like Schulze.https://rankstash.com/finance/credit-rating-agency-rankings/https://rankstash.com/finance/credit-rating-agency-rankings/How credit rating agencies rank borrowers: letter grades from AAA to D, analyst-driven assessment, the issuer-pays model, rating watches, and post-2008 criticisms.https://rankstash.com/finance/dow-jones-industrial-average-method/https://rankstash.com/finance/dow-jones-industrial-average-method/How the Dow Jones Industrial Average works: price weighting, the divisor, 30 committee-picked companies, stock-split distortions, and why critics call it an anachronism.https://rankstash.com/business/ease-of-doing-business-index/https://rankstash.com/business/ease-of-doing-business-index/How the Ease of Doing Business index worked: case-study indicators across 10 regulatory topics, distance-to-frontier scores, the 2021 data scandal, and discontinuation.https://rankstash.com/algorithms/eigenvector-centrality/https://rankstash.com/algorithms/eigenvector-centrality/How eigenvector centrality works: importance from connections to important neighbors, the eigenvector equation, convergence via power iteration, and limitations.https://rankstash.com/sports/elo-rating-system/https://rankstash.com/sports/elo-rating-system/How the Elo rating system works: expected scores, the K-factor, point exchange after each game, update frequency, and well-documented limitations.https://rankstash.com/finance/esg-company-scoring-systems/https://rankstash.com/finance/esg-company-scoring-systems/How ESG scoring systems rank companies: environmental, social and governance pillars, disclosure-based indicators, provider divergence, and greenwashing criticisms.https://rankstash.com/finance/fico-credit-score/https://rankstash.com/finance/fico-credit-score/How the FICO credit score works: the five weighted factors (payment history 35%, amounts owed 30%), the 300–850 range, update mechanics, and criticisms.https://rankstash.com/sports/fide-chess-rating-system/https://rankstash.com/sports/fide-chess-rating-system/How the FIDE chess rating system works: Elo-based ratings, K-factors by player level, monthly lists, rating floors, title norms, and limitations.https://rankstash.com/business/fortune-500-methodology/https://rankstash.com/business/fortune-500-methodology/How the Fortune 500 ranks companies: total revenue as the sole criterion, eligibility rules, the Global 500 variant, and criticisms of revenue-only ranking.https://rankstash.com/algorithms/glicko-rating-system/https://rankstash.com/algorithms/glicko-rating-system/How the Glicko rating system works: ratings deviation (RD) beside every rating, volatility in Glicko-2, inactivity effects, and use by major chess platforms.https://rankstash.com/business/global-competitiveness-index/https://rankstash.com/business/global-competitiveness-index/How the Global Competitiveness Index ranked economies: 12 pillars, executive surveys plus hard data, development-stage weighting, and why the index paused.https://rankstash.com/technology/google-play-store-ranking-factors/https://rankstash.com/technology/google-play-store-ranking-factors/How Google Play ranks apps: install velocity, ratings, retention and uninstalls, Android vitals, metadata relevance, and how it differs from Apple's App Store.https://rankstash.com/education/google-scholar-h-index/https://rankstash.com/education/google-scholar-h-index/How the h-index works on Google Scholar: the h-papers-with-h-citations definition, i10-index, profile rankings, career-length bias, and gaming concerns.https://rankstash.com/algorithms/hits-algorithm/https://rankstash.com/algorithms/hits-algorithm/How the HITS algorithm works: mutually reinforcing hub and authority scores, query-dependent ranking, eigenvector computation, and how it differs from PageRank.https://rankstash.com/sports/icc-cricket-rankings/https://rankstash.com/sports/icc-cricket-rankings/How the ICC cricket rankings work: rolling multi-year team ratings across Test, ODI and T20I formats, weighted recency, player ratings, and limitations.https://rankstash.com/media/imdb-rating-system/https://rankstash.com/media/imdb-rating-system/How IMDb ratings work: the 1–10 user vote, weighted averages, Top 250 minimum-vote thresholds, ballot-stuffing defenses, and known limitations.https://rankstash.com/education/journal-impact-factor/https://rankstash.com/education/journal-impact-factor/How the Journal Impact Factor works: the two-year citation ratio, JCR rankings and quartiles, field bias, gaming tactics, and the DORA critique.https://rankstash.com/education/leiden-ranking/https://rankstash.com/education/leiden-ranking/How the CWTS Leiden Ranking works: bibliometric-only indicators, top-percentile citation measures, no composite score, and the philosophy of ranking responsibly.https://rankstash.com/sports/massey-ratings/https://rankstash.com/sports/massey-ratings/How the Massey Ratings work: least-squares regression on game outcomes, margin-of-victory variants, predictive rating differences, and limitations.https://rankstash.com/media/metacritic-score-aggregation/https://rankstash.com/media/metacritic-score-aggregation/How the Metacritic Metascore works: converting critic reviews to 0–100, weighted averaging with critic weights, color bands, and opacity criticisms.https://rankstash.com/media/nielsen-tv-ratings-methodology/https://rankstash.com/media/nielsen-tv-ratings-methodology/How Nielsen TV ratings work: household panels, people meters, ratings vs share, demographic estimates, C3/C7 commercial metrics, and streaming-era changes.https://rankstash.com/sports/olympic-medal-table-ranking-methods/https://rankstash.com/sports/olympic-medal-table-ranking-methods/How Olympic medal tables rank nations: gold-first vs total medals, weighted points systems, per-capita alternatives, and why the IOC publishes no official order.https://rankstash.com/technology/podcast-chart-ranking-systems/https://rankstash.com/technology/podcast-chart-ranking-systems/How Apple Podcasts and Spotify charts rank podcasts: follows and listening velocity over lifetime downloads, category segmentation, and chart-gaming concerns.https://rankstash.com/education/qs-world-university-rankings/https://rankstash.com/education/qs-world-university-rankings/How the QS World University Rankings work: reputation surveys, citations per faculty, internationalization ratios, indicator weights, and criticisms.https://rankstash.com/finance/risk-scoring-models-banking/https://rankstash.com/finance/risk-scoring-models-banking/How bank risk scoring works: PD/LGD/EAD, application and behavioral scorecards, logistic regression, Basel internal ratings, and model-risk regulation.https://rankstash.com/media/rotten-tomatoes-scoring-system/https://rankstash.com/media/rotten-tomatoes-scoring-system/How Rotten Tomatoes ranks films: the binary fresh/rotten read, the Tomatometer percentage, Certified Fresh thresholds, audience score, and criticisms.https://rankstash.com/finance/sp-500-index-methodology/https://rankstash.com/finance/sp-500-index-methodology/How the S&P 500 works: committee selection criteria, float-adjusted market-cap weighting, profitability requirements, quarterly rebalancing, and criticisms.https://rankstash.com/education/scimago-institutions-rankings/https://rankstash.com/education/scimago-institutions-rankings/How the SCImago Institutions Rankings work: Scopus-based research, innovation, and societal impact indicators, the 50/30/20 weighting, and limitations.https://rankstash.com/technology/spotify-chart-ranking-methodology/https://rankstash.com/technology/spotify-chart-ranking-methodology/How Spotify charts rank music: stream counting windows, daily and weekly charts, editorial vs algorithmic playlists, and chart-manipulation concerns.https://rankstash.com/technology/steam-game-ranking-system/https://rankstash.com/technology/steam-game-ranking-system/How Steam ranks games: top-seller revenue charts, recent and overall review scores, wishlists, the personalized Discovery Queue, and visibility-rounds mechanics.https://rankstash.com/finance/stock-market-index-weighting-methods/https://rankstash.com/finance/stock-market-index-weighting-methods/How stock indexes weight companies: price-weighted, market-cap weighted, equal-weighted, and fundamental weighting — the design choices behind every index.https://rankstash.com/education/the-world-university-rankings/https://rankstash.com/education/the-world-university-rankings/How the Times Higher Education rankings work: the five pillars (teaching, research, citations, industry, international outlook), indicator weights, and criticisms.https://rankstash.com/algorithms/trueskill-ranking-system/https://rankstash.com/algorithms/trueskill-ranking-system/How the TrueSkill ranking system works: skill as a Gaussian belief (mu and sigma), team and multiplayer support, factor-graph updates, and use in Xbox Live.https://rankstash.com/education/us-news-college-rankings/https://rankstash.com/education/us-news-college-rankings/How the U.S. News college rankings work: graduation outcomes, peer assessment, faculty resources, social mobility weighting, methodology changes, and controversies.https://rankstash.com/sports/uefa-club-coefficient/https://rankstash.com/sports/uefa-club-coefficient/How the UEFA club coefficient works: the five-season rolling window, points for wins and progression in European competition, seeding use, and limitations.https://rankstash.com/sports/uefa-national-team-coefficient/https://rankstash.com/sports/uefa-national-team-coefficient/How the UEFA national team coefficient works: points per match result, competition and playoff weighting, cycle-based aggregation, and how it differs from FIFA rankings.https://rankstash.com/finance/vantagescore-credit-model/https://rankstash.com/finance/vantagescore-credit-model/How VantageScore works: the tri-bureau model, its factor weightings, thin-file scoring from one month of history, the 300–850 range, and how it differs from FICO.https://rankstash.com/sports/world-football-elo-ratings/https://rankstash.com/sports/world-football-elo-ratings/How the World Football Elo Ratings work: Elo-based point exchange, home advantage, goal difference, match importance, and how they differ from FIFA rankings.https://rankstash.com/sports/wta-tennis-rankings/https://rankstash.com/sports/wta-tennis-rankings/How the WTA tennis rankings work: the 52-week rolling points system, tournament tier weighting, best-18 counting rule, update frequency, and limitations.https://rankstash.com/technology/youtube-video-ranking-system/https://rankstash.com/technology/youtube-video-ranking-system/How YouTube ranks videos: watch time, click-through rate, engagement and satisfaction signals, personalization across Home, Suggested and Search — at a high level.https://rankstash.com/sports/fifa-world-rankings/https://rankstash.com/sports/fifa-world-rankings/How the FIFA World Rankings work: what they rank, the Elo-based calculation model, match importance weighting, update frequency, and known limitations.https://rankstash.com/algorithms/pagerank-algorithm/https://rankstash.com/algorithms/pagerank-algorithm/How the PageRank algorithm works: the random-surfer model, link-based importance, the damping factor, update history, and well-documented limitations.