In the year 2015, the summer of migration, or the so-called migration crisis, led to a high increase in irregular migration from the Great Middle East and West Africa to Europe. This tremendous change in immigration behaviour provoked a new urgency on the agendas of European governments. In a short amount of time, national governments and the European Union advanced their immigration- and border-related policies and started to engage largely in remote migration management, such as through information campaigns. The political idea behind a policy of information campaigns about migration is to raise awareness, combat prevailing misinformation, and influence migration behaviour in regions with high irregular immigration rates to Europe but assigned as ‘safe origin’. However, little is known about whether and how this mean of political communication works. To explain the influence of migration information campaigns on migration behaviour among the target audience, I connect and apply established theoretical concepts from related disciplines. More specifically, I combine prospect theory as a migration decision making model with dual process theories for information processing expectations. I argue that different moderating and mediating factors may enhance the direct effect magnitude of the respective information and strengthen its persistence. With the aim of revealing causality, I test these relations empirically in a series of randomised field experiments and an online panel survey experiment in Nigeria. Since young Nigerians are a typical case target group for this policy implementation, the studies are implemented in schools and universities in the capital city Abuja and in Benin City, a large city known for its migration hub. In the first of three papers (Paper I) I uncover that these migration information campaigns have a general influence on migration behaviour. Additionally, I generate first insights on one mechanism enhancing the impact of information on migration decision making: the emotions, such as anxiety, triggered in the audience. In Paper II, I investigate the mediating mechanisms further by comparing the effect of emotions with a more ethically tolerable one, the credibility of the sender of information. Both mediators show similar (positive) effects on awareness, but for re-telling behaviour, sender credibility seems to be crucial. Emotions and credibility show that they are not reinforcing each other’s effects, and hence one could compensate for the other. Paper III dives deeper into the mediating effect of sender credibility for different sender types, such as NGOs, governments, and social contacts, being either international or local. The direct outcomes of irregular migration intentions and their effect persistence vary with sender type. In conclusion, my dissertation makes at least two important contributions to the previous literature. First, I develop a theoretical model that connects approaches from related fields and applies them to the political science sub-field of migration. Second, I perform rigorous empirical tests in a real-life setting. The experimental evidence gives causal insights on the general effect of political migration information on migration behaviour and additionally reveals rare causal knowledge on the mechanisms activated. This evidence is valuable for the continuance and the advancement of the policy of migration information campaigns, but also for the broader literature applying the basic mechanism of attitude and behaviour change based on information. Examples may be media literature, (electoral) information campaign literature, or the recently increasing literature on combating misinformation