Librería Samer Atenea
Kálamo Books
Librería Perelló (Valencia)
Librería Elías (Asturias)
Librería Kolima (Madrid)
Librería Proteo (Málaga)
How do we find the TRUE CAUSE of what happens? When Momo drinks a special smoothie and wonders, 'but how do we REALLY know if it makes me jump higher?', she and her twin Puri discover the economist’s secret: comparing 'what is' with 'what would have been.' Playground adventures that teach the same tools economists use to find answers. Prepare for 'aha!' moments at any age!Building tomorrow’s problem-solvers, one story at a time.This is Volume 1 of the Impact Evaluation Series for Children and a brief introduction to the concept of Counterfactuals in Research Design and Methodology.