--- title: "Stefan Riezler — author profile and papers" description: "Stefan Riezler, Heidelberg University: 2 papers on Elamur Research (2002–2005), h-index 30 — affiliations, topics, co-authors and who cites them in our…" canonical: "https://research.elamur.ai/free/en/authors/stefan-riezler/" --- [Elamur Research](https://md.research.elamur.ai/free/en/) · [this page in HTML](https://research.elamur.ai/free/en/authors/stefan-riezler/) [home](https://md.research.elamur.ai/free/en/) / [authors](https://md.research.elamur.ai/free/en/authors/) / Stefan Riezler # Stefan Riezler Stefan Riezler works in computational linguistics, mainly on statistical approaches to [syntax and grammar formalisms](https://md.research.elamur.ai/free/en/topics/syntax-grammar/) and to [machine translation](https://md.research.elamur.ai/free/en/topics/machine-translation/). Their papers here pair rich language-processing systems, such as a hand-built grammar or a phrase-based translation system, with discriminative log-linear models. Two questions recur: how such systems can be trained and made robust on real text, and how differences between their outputs can be measured in a trustworthy way. The most cited of these papers is [Parsing the Wall Street Journal using a Lexical-Functional Grammar and Discriminative Estimation Techniques](https://md.research.elamur.ai/free/en/papers/riezler-2002-parsing-wall-street-journal-lexical/) (2002). It took a stochastic parser driven by a detailed English Lexical-Functional Grammar and applied it to the Penn Wall Street Journal treebank. Rather than converting the treebank into the grammar's own formalism, the work used its shallow brackets and labels to narrow down the parser's candidate analyses. When no complete parse was found, it covered a sentence with as few well-formed chunks as possible. It also capped processing effort, so that long inputs were still handled within reasonable time. The next most cited work, and the more recent of the two, is [On Some Pitfalls in Automatic Evaluation and Significance Testing for MT](https://md.research.elamur.ai/free/en/papers/riezler-2005-some-pitfalls-automatic-evaluation-significance/) (2005). Here the focus moves from parsing to evaluation. The paper built a reranker over the candidate translations of a phrase-based system trained on Europarl and tested whether small differences between its variants could be detected reliably. It compared the metrics BLEU, NIST and a dependency-based F-score, and it set the bootstrap test against approximate randomization. Riezler is currently at [Heidelberg University](https://md.research.elamur.ai/free/en/universities/heidelberg-university/). Earlier bylines include the [University of Stuttgart](https://md.research.elamur.ai/free/en/universities/university-of-stuttgart/), the [Palo Alto Research Center](https://md.research.elamur.ai/free/en/labs/palo-alto-research-center/) and [Google](https://md.research.elamur.ai/free/en/companies/google/). The parsing paper was written with [Ronald M. Kaplan](https://md.research.elamur.ai/free/en/authors/ronald-m-kaplan/), [Tracy Holloway King](https://md.research.elamur.ai/free/en/authors/tracy-holloway-king/) and [Mark Johnson](https://md.research.elamur.ai/free/en/authors/mark-johnson/). Stefan Riezler has 2 papers in our library, in 2002–2005, most of them on [Machine translation](https://md.research.elamur.ai/free/en/topics/machine-translation/), [Evaluation & benchmarks](https://md.research.elamur.ai/free/en/topics/evaluation-benchmarks/), [Syntax & grammar formalisms](https://md.research.elamur.ai/free/en/topics/syntax-grammar/); often with [Mark Johnson](https://md.research.elamur.ai/free/en/authors/mark-johnson/), [Ronald M. Kaplan](https://md.research.elamur.ai/free/en/authors/ronald-m-kaplan/), [Tracy Holloway King](https://md.research.elamur.ai/free/en/authors/tracy-holloway-king/). 2 papers in our library · 2002–2005 [OpenAlex](https://openalex.org/A5011749347) · [**h-index 30**](https://openalex.org/authors/A5011749347) · [204 works](https://openalex.org/works?filter=author.id:A5011749347) · [3,296 citations](https://openalex.org/works?filter=author.id:A5011749347&sort=cited_by_count:desc) OpenAlex, 2026-10-14 [📄 2 works in our library](https://md.research.elamur.ai/free/en/authors/stefan-riezler/#papers) · [🔗 597 citations in our library](https://md.research.elamur.ai/free/en/authors/stefan-riezler/cited-by/) · [11 more in our library without a page yet](#also) · [⭐ Paper Star rank #2444](https://md.research.elamur.ai/free/en/paper-stars/page/25/#star-2444) The profile is the library's match of the name; two people with one name are not always told apart. Elsewhere: [Google Scholar](https://scholar.google.com/citations?view_op=search_authors&mauthors=Stefan+Riezler) · [Semantic Scholar](https://www.semanticscholar.org/search?q=Stefan+Riezler) · [dblp](https://dblp.org/search?q=Stefan+Riezler) · [ACL Anthology](https://aclanthology.org/search/?q=Stefan+Riezler) ## Affiliations [🎓**Heidelberg University** Heidelberg · Germany 2011–2025 · 100 papers*current*](https://md.research.elamur.ai/free/en/universities/heidelberg-university/) · [🎓**University of Stuttgart** Stuttgart · Germany 1999–2008 · 10 papers](https://md.research.elamur.ai/free/en/universities/university-of-stuttgart/) · [🏢**Google** Mountain View · United States 2007–2023 · 7 papers](https://md.research.elamur.ai/free/en/companies/google/) · [🔬**Palo Alto Research Center** Palo Alto · United States 2001–2006 · 5 papers](https://md.research.elamur.ai/free/en/labs/palo-alto-research-center/) · [🎓**University of Tübingen** Tübingen · Germany 1997–2006 · 3 papers](https://md.research.elamur.ai/free/en/universities/university-of-tubingen/) From the bylines of their papers (OpenAlex, 2026-10-14), ORCID and Wikidata; institutions on papers are matched by machine. 2 more institutions on single bylines are not listed. ## Topics [Machine translation (1)](https://md.research.elamur.ai/free/en/topics/machine-translation/) · [Evaluation & benchmarks (1)](https://md.research.elamur.ai/free/en/topics/evaluation-benchmarks/) · [Syntax & grammar formalisms (1)](https://md.research.elamur.ai/free/en/topics/syntax-grammar/) ## Works by year ### 2000s [**2005** 1 paper](https://md.research.elamur.ai/free/en/papers/riezler-2005-some-pitfalls-automatic-evaluation-significance/) · [**2002** 1 paper](https://md.research.elamur.ai/free/en/papers/riezler-2002-parsing-wall-street-journal-lexical/) ## Papers The most cited first (OpenAlex and our library). 1. **[Parsing the Wall Street Journal using a Lexical-Functional Grammar and Discriminative Estimation Techniques](https://md.research.elamur.ai/free/en/papers/riezler-2002-parsing-wall-street-journal-lexical/)** *(2002 · 396 citations)* The paper scales a stochastic parser built on a hand-written, linguistically detailed grammar up to the UPenn Wall Street Journal (WSJ) treebank. 2. **[On Some Pitfalls in Automatic Evaluation and Significance Testing for MT](https://md.research.elamur.ai/free/en/papers/riezler-2005-some-pitfalls-automatic-evaluation-significance/)** *(2005 · 318 citations)* The authors examine how to reliably detect very small differences between statistical machine translation (SMT) systems. ## Also in our library 11 more works of theirs are in our library without a page here yet; they will appear as we publish them. ## Co-authors here 3 co-authors with a page, the most papers together first. - [Mark Johnson](https://md.research.elamur.ai/free/en/authors/mark-johnson/) - [Ronald M. Kaplan](https://md.research.elamur.ai/free/en/authors/ronald-m-kaplan/) - [Tracy Holloway King](https://md.research.elamur.ai/free/en/authors/tracy-holloway-king/) ## Cited by Papers of our library cite their works 597 times (of the 140,884 papers whose bibliographies we read); [58 citing papers with a page here →](https://md.research.elamur.ai/free/en/authors/stefan-riezler/cited-by/).