Added JOSS citation

.Rbuildignore

@@ -14,4 +14,5 @@
 ^tests/testthat/setup\.R$
 ^CRAN-SUBMISSION$
 ^paper$
-^CONTRIBUTING\.md$
+^CONTRIBUTING\.md$
+^CITATION\.cff$

CITATION.cff

@@ -0,0 +1,26 @@
+cff-version: "1.2.0"
+authors:
+- family-names: Martin
+  given-names: Steve
+  orcid: "https://orcid.org/0000-0003-2544-9480"
+doi: 10.5281/zenodo.13323298
+message: If you use this software, please cite our article in the
+  Journal of Open Source Software.
+preferred-citation:
+  authors:
+  - family-names: Martin
+    given-names: Steve
+    orcid: "https://orcid.org/0000-0003-2544-9480"
+  date-published: 2024-09-06
+  doi: 10.21105/joss.06781
+  issn: 2475-9066
+  issue: 101
+  journal: Journal of Open Source Software
+  publisher:
+    name: Open Journals
+  start: 6781
+  title: "piar: Price Index Aggregation in R"
+  type: article
+  url: "https://joss.theoj.org/papers/10.21105/joss.06781"
+  volume: 9
+title: "piar: Price Index Aggregation in R"

README.Rmd

@@ -22,6 +22,7 @@ knitr::opts_chunk$set(
 [![codecov](https://codecov.io/gh/marberts/piar/graph/badge.svg?token=lHDHsGHsLd)](https://app.codecov.io/gh/marberts/piar)
 [![DOI](https://zenodo.org/badge/370889275.svg)](https://zenodo.org/doi/10.5281/zenodo.10110046)
 [![Mentioned in Awesome Official Statistics ](https://awesome.re/mentioned-badge.svg)](https://github.com/SNStatComp/awesome-official-statistics-software)
+[![DOI](https://joss.theoj.org/papers/10.21105/joss.06781/status.svg)](https://doi.org/10.21105/joss.06781)
 <!-- badges: end -->
 
 Most price indexes are made with a two-step procedure, where period-over-period *elemental indexes* are first calculated for a collection of *elemental aggregates* at each point in time, and then aggregated according to a *price index aggregation structure*. These indexes can then be chained together to form a time series that gives the evolution of prices with respect to a fixed base period. This package contains a collection of functions that revolve around this work flow, making it easy to build standard price indexes, and implement the methods described by Balk (2008), von der Lippe (2007), and the CPI manual (2020) for bilateral price indexes.

README.md

@@ -16,6 +16,7 @@ Version](https://img.shields.io/conda/vn/conda-forge/r-piar.svg)](https://anacon
 [![DOI](https://zenodo.org/badge/370889275.svg)](https://zenodo.org/doi/10.5281/zenodo.10110046)
 [![Mentioned in Awesome Official
 Statistics](https://awesome.re/mentioned-badge.svg)](https://github.com/SNStatComp/awesome-official-statistics-software)
+[![DOI](https://joss.theoj.org/papers/10.21105/joss.06781/status.svg)](https://doi.org/10.21105/joss.06781)
 <!-- badges: end -->
 
 Most price indexes are made with a two-step procedure, where

inst/CITATION

@@ -1,3 +1,16 @@
+bibentry(
+  bibtype  = "Article",
+  title    = "{piar}: Price Index Aggregation R",
+  author   = person("Steve", "Martin",
+                    comment = c(ORCID = "0000-0003-2544-9480")),
+  year     = "2024",
+  doi      = "doi.org/10.21105/joss.06781",
+  journal  = "Journal of Open Source Software",
+  volume    = "9",
+  number   = "101",
+  pages    = "6781"
+)
+
 bibentry(
   bibtype  = "Manual",
   title    = "{piar}: Price Index Aggregation",