A thought-provoking reminder that measuring our economy is not an exact science. This book is a compelling invitation to economists and statisticians to collaborate and increase transparency about the size of measurement error in economic data, so that these data are used responsibly for analysis and policy making. -- Fabienne Fortanier, Director of Statistics, De Nederlandsche Bank, The Netherlands Homo numerus needs to be tamed. It is not that quantitative analysis should be abandoned, only that precise data allied with precise language and absent of caveats can mislead. This book provides ample evidence and offers guidance on addressing these issues, challenging the myth that measurement error is an exclusively Global South problem. This important antidote goes beyond economics of relevance to public policy analysis generally. -- James Mitchell, University of Edinburgh, UK In times when disinformation damages the functioning of democracies, a book about honest that is, scientific communication about economic statistics is very welcome. This book invites producers and users of economic data to be more transparent about the inevitable inaccuracies in their figures and how you can report these inaccuracies. -- Marcel Boumans, Utrecht University, the Netherlands