E3-Modelling (E3M) is a knowledge-based company created as a spin-off of modelling and economic research performed over many years in E3MLab. E3-Modelling is specialized in the development of complex models and carries out impact assessment studies focusing in the fields of economy, energy and the environment as well as markets, for 36 countries in Europe, G-20, MENA countries, the Russian Federation and the emerging economies globally. E3M provides consultancy services based on the use of complex large-scale applied mathematical models ranging from the GEM-E3, a computable general equilibrium model, the European energy system model PRIMES, the PRIMES-TREMOVE Transport model and the global stochastic energy model PROMETHEUS, to sector-specific models on energy efficiency in buildings, industrial sector and the renewables.