Composition with Red Blue and Yellow working relationship, they were contacted by Theo van Doesburg, a painter who frequently wrote about art for different periodicals and whom is considered the propagandist of the De Stijl movement. He invited Mondrian and van der Leck to join his initiative to start an artistic review periodical. They agreed and the result of this was the journal entitled De Stijl. Together they formed an artistic collective that consisted not only of painters but also architects; the movement was confined to strictly Dutch areas due to war. These artists cannot be considered the same. For example, not all De Stijl artists
Theo van de Klundert and History of Economics at Tilburg University. Among his doctoral students are Casper van Ewijk, Henk van Gemert, George Gelauff, Ad van de Gevel, Raymond Gradus (in cooperation with Piet Verheijen), Rob de Groof, Gustaaf Hes, Lex Meijdam, Richard Nahuis, Henk Peer, Eric Schaling (in cooperation with Sylvester Eijffinger), Sjak Smulders, Ton van Schaik, Herman Thoben and Jeroen van de Ven, Herman Wijffels. In 2001, Van de Klundert retired from Tilburg University. Since 1967, Van de Klundert has been associated with the scientific journal "De Economist", initially as editor, later on as chairman of the board of editors. Since 1976