Umbrella effect

Umbrella effect may refer to:
 * Umbrella effect (ecology). in which the presence of an umbrella species protects other species in the same habitat
 * Umbrella effect (economics). in which a dominant company or cartel creates an "umbrella" of high prices over the rest of the market
 * Umbrella effect (everyday life). in which the act of bringing an umbrella and raincoat, or otherwise preparing thoroughly for inclement weather, appears to prevent the predicted rainfall from occurring
 * Umbrella effect (upper management). in which upper management seems to cast a shadow over their employee's, using them to conduct "shady" business.