Frequency and severity modelling
Generalised linear models relate claim frequency and severity to risk factors, with offsets for exposure, so the contribution of each factor and its uncertainty can be read and reviewed.
GRA · Insurance Nexus
Mekânsal finansSermayenin tehlike, maruziyet ve geçişle buluştuğu yer
Probability and statistics provide the language of insurance: frequency and severity, dependence, credibility and uncertainty. They make assumptions explicit, test them against experience, and show how much confidence any estimate of loss deserves, from a single portfolio’s claim frequency to a national estimate of how many households are uninsured.
Probability and statistics provide the mathematical framework for describing uncertainty and learning from data. They underpin estimation, testing and prediction in every risk discipline. In insurance and catastrophe, climate and hazards and health and biosecurity, statistical methods quantify the likelihood and uncertainty of losses across interconnected sistemleri. They make the evidence behind risk decisions explicit and reproducible. The canonical description is on STEM Commons.
Generalised linear models relate claim frequency and severity to risk factors, with offsets for exposure, so the contribution of each factor and its uncertainty can be read and reviewed.
Prior assumptions from industry or benchmark data are updated with an insurer’s own experience, giving posterior estimates that state how far the data have moved the assumption.
Household surveys on insurance take-up are designed and weighted so that estimates of uninsured shares represent the population, and their sampling error is reported with them.
Etki alanındaki bir portföyün yıllık olarak ve sigortacılar ile kredi verenlerin fiyatladığı 100 yılda 1 ve 250 yılda 1 düzeylerinde bekleyebileceği kayıp; her katastrofi modelinin kullandığı aynı üç bloktan hesaplanır. Belirtilmiş açıklayıcı değerlerle bir öğretim modelidir, tahmin değildir.
Kontroller
Okumalar
| Dönüş süresi (yıl) | Şiddet (şiddet endeksi) | Kayıp (değerin %'si) |
|---|---|---|
| 1 | 0.09 | 0.00 |
| 2 | 1.27 | 0.00 |
| 4 | 1.91 | 0.00 |
| 7 | 2.47 | 0.00 |
| 13 | 3.00 | 0.00 |
| 24 | 3.51 | 0.00 |
| 44 | 4.02 | 0.00 |
| 82 | 4.53 | 23.55 |
| 154 | 5.03 | 26.44 |
| 287 | 5.53 | 28.87 |
| 536 | 6.03 | 30.88 |
| 1,000 | 6.53 | 32.53 |
The model runs on the teaching values set by the controls. To calibrate it for a place, read it against these admitted layers and series, which this page’s map can draw:
Nexus Consortium'un yürüttüğü altı ayak genelinde
Datasets and records used by probability and statistics on this platform, with the role each plays and the label its values carry. Sources are listed in kaynak sicilinde.
| Veri | Rol | Etiket |
|---|---|---|
| Claims and exposure records | Model fitting | BİLDİRİLMİŞ |
| Industry benchmarks | Priors and comparison | TAHMİNİ |
| Household and enterprise surveys | Take-up and gap estimation | GÖZLENEN |
| Supervisory statistical returns | Market aggregates | Yayımlanmış istatistikler |
Bir risk yöneticisinin, denetim kurumunun veya maliye bakanlığının talep edeceği maruziyet, kayıp, senaryo ve sermaye görünümleri ile raporlama yaptıkları çerçeveler. Yapılar denetim ve aktüerya uygulamalarını izler. Değerler açıklayıcıdır: asla fiyat, derecelendirme veya tavsiye değildir.
How losses from probability and statistics in insurance grow with severity, gross and net of reinsurance, against capital.
| Yineleme dönemi | Yıllık olasılık | Brüt kayıp | Net kayıp | Net, sermaye = 100 |
|---|---|---|---|---|
| 10 yılda 1 | 0.10 | 14 | 10 | 10 |
| 50 yılda 1 | 0.02 | 33 | 21 | 21 |
| 100 yılda 1 | 0.01 | 46 | 27 | 27 |
| 250 yılda 1 | 0.004 | 68 | 39 | 39 |
| Ortalama yıllık kayıp | 3.1 | 2.2 | 2.2 |
Results are checked through diagnostics, cross-validation and sensitivity to assumptions. Independent replication confirms findings.
| Kontrol edin | Nasıl yapıldığı |
|---|---|
| Out-of-sample validation | Models are fitted on one period or segment and tested on another; only test performance is reported |
| Residual diagnostics | Residuals are inspected for structure the model has missed, such as trends or clustering |
| Sensitivity to assumptions | Independence, distribution and sampling assumptions are varied and the effect on the result is stated |
Inference depends on assumptions about independence, distribution and sampling that may not hold. Small or biased samples limit reliability.
Sistem Bilimi ve Modelleme stewards probability and statistics for the Consortium and reviews how it is applied across platforms.
Raporlar is the Consortium’s quarterly publication. What you know about this subject can become evidence, a case or a correction in the next edition, credited to you and published under CC BY 4.0 where it is your own work.
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Bilgi ve başvurular bugün açıktır. Bir başvuru bir referans numarası alır ve bir sonraki adımı belirtir; başvurular, ödemeler, işlem kapasitesi tahsisleri ve kayıtlar yalnızca ekipleri, koşulları ve inceleme kapasiteleri mevcut olduğunda açılır.
Bu sitedeki haritalar, veriler ve şekiller bağlam ve genel bilgi amacıyla gösterilir. Tavsiye, tahmin ya da uyarı değildir; bilgilerin sınırları Sorumluluk Reddi ve Veri Bildirimleri'nde açıklanmıştır.
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