''Porteños'' are generally characterized as night owls, cultured, talkative, uninhibited, sensitive, nostalgic, observant and arrogant. Argentines outside Buenos Aires often stereotype its inhabitants as egotist people, a feature that people from the Americas and westerners in general commonly attribute to the entire Argentine population and use as the subject of numerous jokes. Writing for BBC Mundo Cristina Pérez felt that "the idea of the Argentines' vastly developed ego finds strong evidence in lunfardo dictionaries," in words such as "''engrupido''" (meaning "vain" or "conceited") and "''compadrito''" (meaning both "brave" and "braggart"), the latter being an archetypal figure of tango. Paradoxically, ''porteños'' are also described as highly self-critical, something that has been called "the other side of the ego coin." Writers consider the existence of these behaviors the consequence of the European immigration and prosperity that the city experienced during the early 20th century, which generated a feeling of superiority in parts of the population.