ISNPS (International Symposium on NonParametric Statistics) 2024 in Braga, Portugal. Title: A Complete Framework for Model-Free Difference-in-Differences Estimation.

 COMPSTAT 2024 Gießen, Germany. Title: Post-selection inference for fixed and mixed parameters in linear mixed models.

64th ISI World Statistics Congress 2023 in Ottawa, Canada. Title: Advanced inference on mixed effects models for SAE.

International interdisciplinary Conference: Understanding the relationship between the way statisticians model the world and the way other academic disciplines model the world. 2023 in Granada, Spain. Title: Local Machine Learning for Huge and Distributed Data

4th ISNPS (international Society for NonParametric Statistics) 2022 in in Paphos, Cyprus. Title: Bandwidth selection for statistical matching and prediction.

COMPSTAT 2022 Bologna, Italy. Title: Uniform Inference for Small Area Estimation.

Technical workshop on nowcasting in international organizations, 2020 at the United Nations Geneva, Switzerland. Title: Evoking ideas from small area estimation for the timely indicator prediction on a high level of disaggregation.

12th International Conference of the ERCIM WG on computational and methodological Statistics, 2019 at the University of London, UK. Title: Backfitting tests in generalised structured models.

ISI WSC 2019 in Kuala Lumpur, in Malaysia. Title: On Simultaneous / Uniform Inference for Mixed (Small Area) Parameter

5th Institute of Mathematical Statistics Asia Pacific Rim Meeting (distinguished lecture session), 2018 Singapore. Varying Coefficient Models for modelling heterogeneity

3rd ISNPS (international Society for NonParametric Statistics), 2018 in Salerno, Italy. Varying coe cient models for causal inference: estimation and testing with smooth backfitting

CRoNoS Workshop on Multivariate Data Analysis and Software, 2018 Cyprus. Modeling Heterogeneity by Structural Varying Coefficient Models in Presence of Endogeneity

10th International Conference of the ERCIM WG on computational and methodological Statistics, 2017 at the University of London, UK. Multiple comparisons of small areas using bootstrap

Network de métodos cuantitativos en economía - AFADECO, 2017 network meeting in Columbia, Modeling Heterogeneity by Structural Varying Coefficient Models in Presence of Endogeneity

New Methods for the Empirical Analysis of Financial Markets, 2017 conference in Comillas, Spain, An Omnibus Specification Test of Conditional Asset Pricing Models

ILO/IZA Conference: Assessing the effects of labour market reforms - a global perspective, 2016 at the United Nations, Geneva. invited discussant of the session Active Labour Market Policies

8th International Conference of the ERCIM WG on computational and methodological Statistics, 2015 at the University of London, UK. Calibrating non- and semiparametric inference (tests and confidence intervals)

UNECE Conference: Seminar on the Role of National Statistical Offices in the production of Leading, Composite and Sentiment Indicators, 2015 at the United Nations, Geneva. invited chair and discussant of the session Issues specific to economic indicators

2nd ISNPS (international Society for NonParametric Statistics), 2014 in Cadiz, Spain. Modeling heterogeneity by varying coe cient models

Applicable Semiparametrics, 2013 in Berlin, Germany. Heterogeneous returns: chance or challenge for semiparametric methods?

Mathematical Statistics meets Econometrics, 2011 in Mannheim, Germany. Imposing Structure by Prior Knowledge in Semiparametric Analysis

Dryland ecosystem functioning and resilience: integrating biophysical assessment with socio-economic issues, 2011 in Alghero, Italy. Welfare benefits of land management and political intervention

Swiss Statistics Seminar, Spring 2011 in Bern, Switzerland. Imposing Structure by Prior Knowledge in Semiparametric Analysis

ISI 57th Session, 2009 in Durban, South Africa, discussant of the invited session Non- and Semiparametric Statistics

COP 9 - UNCCD, 2009 in Buenos Aires, Argentina. Presentation of the UN assessment report "Economic Aspects & Social Drivers of Desertification and Land Degradation"

27th European Meeting of Statisticians { EMS, 2009 in Toulouse, France. Inference problems with resampling

International Seminar on Nonparametric Inference (ISNI), 2008 in Vigo, Spain. A new class of Semi-mixed effects models

XVI Jornadas de Estadstica de las Comunidades Autnomas, 2008 in Santander, Spain. Avances Recientes en la estimación e inferencia de áreas pequeñas

International Workshop on Applied Probability, 2008 at the Universit de Technologie de Compigne, France. Nonparametric Regression with Effective Nonlinear Principal Components

Conference on Recent Advances in Time Series Analysis, 2008 in Protaras, Cyprus. A Feasible Estimator for Generalized Structured Models

II Workshop on Small Area Statistical Inference, 2007 in Santiago de Compostela, Spain. Semiparametric Inference in Mixed Effects Models with Applications in Small Area Statistics

ICSA (International Chinese Statistical Association), Applied Statistics Symposium, 2007 in Raleigh, NC-USA. Recent Approaches to Semiparametric Engel Curve Estimation

International Seminar on Nonparametric Inference (ISNI), 2005 in A Coruña, Spain. Semiparametric Estimation of Consumer Demand Systems with almost partially linear prize effects

Conference on The Art of Semiparametrics, 2003 in Berlin.  About Sense and Nonsense of Non- and Semiparametric Analysis in Applied Econometrics

ISI 54th Session, 2003 in Berlin, Germany. Inference in semiparametric multi-index Models

Conference on Current Advances and Trends in nonparametric Statistics, 2002 in Crete, Greece: Smooth Backfitting in Practice

Workshop on Nonparametric, Semiparametric and Resampling Methods 2000 at Universidad Carlos III de Madrid, Spain. Non-Uniformity of Job-Matching in a Transition Economy - A Nonparametric Analysis for the Czech Republic

Oberwolfach Seminar 'Controlling Complexity for Strong Stochastic Dependencies', 2000, Germany. Semiparametric estimation of weak and strong separable models

EC2, 1999 in Madrid, Spain: Discussant of the opening talk CaViAR by Robert Engle

6. Ökonometrie Workshop 1997 in Karlsruhe (Germany), Finance on the Net