Normalmente el precio de un contrato llave en mano es una cantidad fija. No obstante, es habitual expresar los precios en un contrato llave en mano en forma de precios unitarios o reembolso de los gastos. Sin embargo, no es infrecuente que los contratos llave en mano a tanto alzado contengan una lista de precios unitarios o precios de algunas partes o componentes de las obras. Tales precios unitarios y parciales sirven para la valoración de las variaciones en los trabajos realizados y también para los pagos parciales.
In February 2000, Amazon announced that it had been granted a patent[17] on components of an affiliate program. The patent application was submitted in June 1997, which predates most affiliate programs, but not PC Flowers & Gifts.com (October 1994), AutoWeb.com (October 1995), Kbkids.com/BrainPlay.com (January 1996), EPage (April 1996), and several others.[18]
An e-commerce merchant wanting to reach a wider base of Internet users and shoppers may hire an affiliate. An affiliate could be the owner of multiple websites or email marketing lists; the more websites or email lists that an affiliate has, the wider his network. The hired affiliate then communicates and promotes the products offered on the e-commerce platform to his network. The affiliate does this by implementing banner ads, text ads, or links on its multiple owned websites or via email to its clientele. Firms use advertisements in the form of articles, videos, and images to draw an audience’s attention to a service or product.
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