Bayesian analysis of radiocarbon dates
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TLDR
An overview of the main model components used in chronological analysis, their mathematical formulation, and examples of how such analyses can be performed using the latest version of the OxCal software (v4) are given.Abstract:
If radiocarbon measurements are to be used at all for chronological purposes, we have to use statistical methods for calibration. The most widely used method of calibration can be seen as a simple application of Bayesian statistics, which uses both the information from the new measurement and information from the 14C calibration curve. In most dating applications, however, we have larger numbers of 14C measurements and we wish to relate those to events in the past. Bayesian statistics provides a coherent framework in which such analysis can be performed and is becoming a core element in many 14C dating projects. This article gives an overview of the main model components used in chronological analysis, their mathematical formulation, and examples of how such analyses can be performed using the latest version of the OxCal software (v4). Many such models can be put together, in a modular fashion, from simple elements, with defined constraints and groupings. In other cases, the commonly used "uniform phase" models might not be appropriate, and ramped, exponential, or normal distributions of events might be more useful. When considering analyses of these kinds, it is useful to be able run simulations on synthetic data. Methods for performing such tests are discussed here along with other methods of diagnosing possible problems with statistical models of this kind.read more
Citations
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References
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Journal ArticleDOI
Discussion: Reporting and calibration of post-bomb 14C data
TL;DR: In this article, the use of fraction modern with a new symbol F{sup 14}C to prevent confusion with the previously used Fm, which may or may not have been fractionation corrected.
Book
Bayesian Approach to Interpreting Archaeological Data
TL;DR: The Bayesian Approach to Statistical Archaeology examines the role of Bayesian inference in the development of dating methods and its applications in archaeology.
Journal ArticleDOI
The intercept is a poor estimate of a calibrated radiocarbon age
TL;DR: In this paper, the weighted average of the probability distribution function is recommended as the best central-point estimate, but more consideration should be given to using the full probability distribution rather than a point estimate in developing age-depth models.
Journal ArticleDOI
'Wiggle matching' radiocarbon dates
TL;DR: In this paper, three different methods of matching radiocarbon dates to the "wiggles" of the calibration curve in those situations where the age difference between the 14C dates is known are discussed.
Journal ArticleDOI
Relationships between calibrated ages and depth in stratigraphical sequences: an estimation procedure by mixed-effect regression
TL;DR: In this article, a generalized mixed-effect regression using an ancillary function for the partitioning of the fixed effect and the random effect corresponding to the degree of representativity of the individual calibrated dates for a particular section of the sedimentary sequence is presented.
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