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Universal 2nd Factor (U2F) is an open standard that strengthens and simplifies two-factor authentication (2FA) using specialized Universal Serial Bus (USB), near-field communication (NFC), or Bluetooth Low Energy (BLE) devices based on similar security technology found in smart cards.
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First YubiKey USB token of the FIDO standard in 2014. The YubiKey is a hardware authentication device manufactured by Yubico to protect access to computers, networks, and online services that supports one-time passwords (OTP), public-key cryptography, authentication, and the Universal 2nd Factor (U2F) and FIDO2 protocols [1] developed by the FIDO Alliance.
Roy's identity reformulates Shephard's lemma in order to get a Marshallian demand function for an individual and a good from some indirect utility function.. The first step is to consider the trivial identity obtained by substituting the expenditure function for wealth or income in the indirect utility function (,), at a utility of :
In an economic model, an exogenous variable is one whose measure is determined outside the model and is imposed on the model, and an exogenous change is a change in an exogenous variable. [ 1 ] : p. 8 [ 2 ] : p. 202 [ 3 ] : p. 8 In contrast, an endogenous variable is a variable whose measure is determined by the model.
The FIDO2 Project is a joint effort between the FIDO Alliance and the World Wide Web Consortium (W3C) whose goal is to create strong authentication for the web. At its core, FIDO2 consists of the W3C Web Authentication standard and the FIDO Client to Authenticator Protocol 2 (CTAP2). [6]
Bioeconomics (fisheries), the study of the dynamics of living resources using economic models; Bioeconomics (biophysical), the study of economic systems applying the laws of thermodynamics; Biological economics, the study of the relationship between human biology and economics; Bioeconomics, the social theory of Nicholas Georgescu-Roegen
A famous example by James Heckman and Bo Honoré who study labor market participation using the Roy model, where the choice equation leads to the Heckman correction procedure. [3] More generally, Heckman and Vytlacil propose the Roy model as an alternative to the LATE framework proposed by Joshua Angrist and Guido Imbens .