Dışsallık ve Kayıtdışı Ekonomi Kavramına İlişkin Bir Değerlendirme

In this tiny study, we aimed at making some distinction among different concepts such as \`unrecorded,\` \`twillight,\` \`underground,\` or \`unofficial\` economy. In making this analysis, we used a matrix of meanings and conditions of informal economy. We suggested some weights for each concept by using asterisks.In the second part, it is tried to make a distinction between the concepts of \`externality\` and the\`informal economy.\` We pointed and stressed an asimmetrical relation between these concepts.