Sommario: 

1. Codice del Terzo settore e codice dei contratti pubblici. L’incerto equilibrio fra solidarietà e concorrenza. 
2. L’affidamento dei servizi sociali tramite convenzione nel codice del Terzo settore. 
2.1. L’art. 56 del codice del Terzo settore come norma di attuazione dei principi espressi dalla più recente giurisprudenza della Corte di giustizia Ue.
2.2 Quando le convenzioni sono «più favorevoli rispetto al ricorso al mercato»?
3. Il trasporto sanitario di emergenza e urgenza nell’art. 57 del codice del Terzo settore: dal genus alla species 
4. Gli appalti di servizi sociali nella dir. 2014/24/Ue: la ricerca di un equilibrio fra concorrenza e solidarietà.
5. Gli appalti di servizi sociali nel codice dei contratti pubblici: un’occasione non colta appieno. 
6. La complementarietà fra i due Codici: per ricomporre la dicotomia fra solidarietà e mercato.

Abstract
The Public Procurement Code (d.lgs. n. 50/2016) and the Code for NonProfit Organisations (d.lgs. n. 117/2017) have been approved by the Government within a period of about a year. Nevertheless, there are many problems of coordination between the two Codes, which regulate in different ways the award of social services to Non-profit (voluntary) organisation. On the one hand, in accordance with the principle of competition and with the European Directive 24/2014, the Decree 50/2016 provides for public procurements procedures (although simplified). On the other hand, the Decree n. 117/2017 allows public administration to enter into agreements with voluntary organisation following a more informal tender procedure. This includes solidarity aims and the gratuity of the activity, in accordance with the Italian constitutional principles of solidarity and to most recent decisions of the Court of Justice of the European Union. The essay examines the two sets of regulations in the light of the evolution of the Italian and European law and case law, outlining the problems arising from their interpretation and application. The study shows how both competition and solidarity principles are deeply rooted into European Treaties and Directives and how the principle of solidarity is embedded into the regulation of many economic activities. However, the balance between the two principles in European Law is still uncertain and often ambiguous. This uncertainty produces important consequences also on the distinction between services of economic or not economic interest, which thus becomes less useful to define the realm of application of public procurement law.