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  2. PSA prepayment model - Wikipedia

    en.wikipedia.org/wiki/PSA_prepayment_model

    Each monthly prepayment is assumed to represent full payoff of individual loans, rather than a partial prepayment that leaves a loan with a reduced principal balance. Variations of the model are expressed in percent, e.g., "150% PSA" means a monthly increase of 0.3% in the annualized prepayment rate, until the peak of 9% is reached after 30 months.

  3. Public Service Association - Wikipedia

    en.wikipedia.org/wiki/Public_Service_Association

    The Public Service Association (Māori: Te Pūkenga Here Tikanga Mahi), or PSA, is a democratic trade union with over 90,000 workers in the New Zealand public sector.. The stated aims of the PSA are to provide support for public and not-for-profit community services, support worker voices and participation though unions, ensure workplaces are free from discrimination, and advance the Te Tiriti ...

  4. Purchase and sale agreement - Wikipedia

    en.wikipedia.org/wiki/Purchase_and_Sale_Agreement

    A purchase and sale agreement (PSA), also called a sales and purchase agreement (SPA) [1] or an agreement for purchase and sale (APS), [2] is an agreement between a buyer and a seller of real estate property, company stock, or other assets.

  5. PSA - Wikipedia

    en.wikipedia.org/wiki/PSA

    PSA 5.7 Rock, a pistol; Penal substitutionary atonement, a theory of atonement in Christianity; Professional Sports Authenticator (PSA), an authenticator of sports and trading cards; Autonomous Socialist Party (disambiguation) Pisa language or Asue Awyu, ISO 639-3 code psa; Piscis Austrinus (Southern Fish) constellation, IAU abbreviation PsA

  6. Philippine Statistics Authority - Wikipedia

    en.wikipedia.org/wiki/Philippine_Statistics...

    The Philippine Statistics Authority (Filipino: Pangasiwaan ng Estadistika ng Pilipinas; PSA) is the central statistical authority of the Philippine government that collects, compiles, analyzes, and publishes statistical information on economic, social, demographic, political affairs, and general affairs of the people of the Philippines, as well as enforcing the civil registration functions in ...

  7. Public Servants Association of South Africa - Wikipedia

    en.wikipedia.org/wiki/Public_Servants...

    The Public Servants Association of South Africa (PSA) is a trade union for public sector workers in South Africa. The PSA the largest politically non-affiliated trade union for public servants in the country. It was founded in 1920 and has a membership of more than 245,000 members.

  8. PS Power and Sample Size - Wikipedia

    en.wikipedia.org/wiki/PS_Power_and_Sample_Size

    Matched or independent study designs may be used. Power, sample size, and the detectable alternative hypothesis are interrelated. The user specifies any two of these three quantities and the program derives the third. A description of each calculation, written in English, is generated and may be copied into the user's documents.

  9. Polar surface area - Wikipedia

    en.wikipedia.org/wiki/Polar_surface_area

    The polar surface area (PSA) or topological polar surface area (TPSA) of a molecule is defined as the surface sum over all polar atoms or molecules, primarily oxygen and nitrogen, also including their attached hydrogen atoms. PSA is a commonly used medicinal chemistry metric for the